Publications

2020

Momentum Resolved Superconducting Energy Gaps of Sr2RuO4 from Quasiparticle Interference Imaging

Ritika Dusad, Franziska K. K. Kirschner, Jesse C. Hoke, Benjamin Roberts, Anna Eyal, Felix Flicker, Graeme M. Luke, Stephen J. Blundell, J. C. Séamus Davis
and Vidya Madhavan 
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Fractionalized pair density wave in the pseudo-gap phase of cuprate superconductors

D. Chakraborty, M. Grandadam, M. H. Hamidian, J. C. S. Davis, Y. Sidis and C. Pépin
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The Physics of Pair Density Waves

Daniel F. Agterberg, J. C. Séamus Davis, Stephen D. Edkins, Eduardo Fradkin, Dale J. Van Harlingen, Steven A. Kivelson,
Patrick A. Lee, Leo Radzihovsky, John M. Tranquada and Yuxuan Wang
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2019

Magnetic Monopole Noise

Ritika Dusad, Franziska K. K. Kirschner, Jesse C. Hoke, Benjamin Roberts, Anna Eyal, Felix Flicker, Graeme M. Luke, Stephen J. Blundell, J. C. Séamus Davis
Nature 571, 234 
published article - download PDF

Machine learning in electronic-quantum-matter imaging experiments

Yi Zhang, A. Mesaros, K. Fujita, S. D. Edkins, M. H. Hamidian, K. Ch'ng, H. Eisaki, S. Uchida, J. C. Séamus Davis, E. Khatami, Eun-Ah Kim
Nature 570, 484 
published article - download PDF

Magnetic-field induced pair density wave state in the cuprate vortex halo

Stephen D. Edkins, Andrey Kostin, Kazuhiro Fujita, Andrew P. Mackenzie, Hiroshi Eisaki, Shin-Ichi Uchida, Subir Sachdev, Michael J. Lawler, Eun-Ah Kim, J. C. Séamus Davis, Mohammad H. Hamidian
Science 364, 976
published article - download PDF

Evidence for a Vestigial Nematic State in the Cuprate Pseudogap Phase

Sourin Mukhopadhyay, Rahul Sharma, Chung Koo Kim, Stephen D. Edkins, Mohammad H. Hamidian, Hiroshi Eisaki, Shin-ichi Uchida, Eun-Ah Kim, Michael J. Lawler, Andrew P. Mackenzie, J. C. Séamus Davis and Kazuhiro Fujita
Proc. Nat'l Acad. Sci. 116, 13249
published article - download PDF

2018

Common Glass-Forming Spin-Liquid State in the Pyrochlore Magnets Dy2Ti2O7 and Ho2Ti2O7

Azar B. Eyvazov, Ritika Dusad, Timothy J. S. Munsie, Hanna A. Dabkowska, Graeme M. Luke, Ethan R. Kassner, J. C. Séamus Davis, Anna Eyal
Phys. Rev. B 98, 214430
published article - download PDF

Imaging orbital-selective quasiparticles in the Hund's metal state of FeSe

A. Kostin, P. O. Sprau, A. Kreisel, Yi Xue Chong, A. E. Böhmer, P. C. Canfield, P. J. Hirschfeld, B. M. Andersen, J. C. Séamus Davis
Nature Materials 17, 869
published article - download PDF

In-situ angle-resolved photoemission spectroscopy of copper-oxide thin films synthesized by molecular beam epitaxy

Chung Koo Kim, Ilya K. Drozdov, Kazuhiro Fujita, J. C. Séamus Davis, Ivan Bozovic, Tonica Valla
Phys. Rev. B 97, 174510
published article - download PDF

Pair density waves in superconducting vortex halos

Y. Wang, S. D. Edkins, M. H. Hamidian, J. C. Séamus Davis, E. Fradkin, S. A. Kivelson
Phys. Rev. B 97, 174510
published article - download PDF

Quantum oscillations in a biaxial pair density  wave state 

M. R. Norman, J. C. Séeamus Davis
Proc. Nat'l Aacd. Sci. 115, 5389
published article - download PDF 

2017

Orbital superconductivity, defects, and pinned nematic fluctuations in the doped iron chalcogenide FeSe0.45Te0.55

Saheli Sarkar, John Van Dyke, Peter O. Sprau, Freek Massee, Ulrich Welp, Wai-Kwong Kwok, J. C. Séamus Davis, and Dirk K. Morr<
Phys. Rev. B 96, 060504(R)
published article - download PDF

Discovery of orbital-selective Cooper pairing in FeSe

 P.O. Sprau, A. Kostin, A. Kreisel, A. E. Böhmer, V. Taufour, P.C. Canfield, S. Mukherjee, P.J. Hirschfeld, B.M. Andersen, J. C. Séamus Davis
Science 357, 75
published article - download PDF

Orbital selective pairing and gap structures of iron-based superconductors

Andreas Kreisel, Brian M. Andersen, P. O. Sprau, A.Kostin, J. C. Séamus Davis and P. J. Hirschfeld
Phys. Rev. B 95, 174504
published article - download PDF

2016

Commensurate 4a0-period charge density modulations throughout the Bi2Sr2CaCu2O8+x pseudogap regime

Andrej Mesaros, Kazuhiro Fujita, Stephen D. Edkins, Mohammad H. Hamidian, Hiroshi Eisaki, Shin-ichi Uchida, J. C. Séamus Davis, Michael J. Lawler, and Eun-Ah Kim
Proc. Nat'l Acad. Sci. 113, 12661
published article - download PDF

Detection of a Cooper Pair Density Wave in Bi2Sr2CaCu2O8+x 

M. H. Hamidian, S. D. Edkins, Sang Hyun Joo, A. Kostin, H. Eisaki, S. Uchida, M. J. Lawler, E. -A. Kim, A. P. MacKenzie, K. Fujita, Jinho Lee, J. C. Séamus Davis
Nature 532, 343 (21 Apr 2016)
published article - download PDF

Atomic-scale electronic structure of the cuprate d-symmetry form factor density wave state

M. H. Hamidian, S. D. Edkins, Chung Koo Kim, J. C. Séamus Davis, A. P. Mackenzie, H. Eisaki, Uchida, M. J. Lawler, E. -A. Kim, Subir Sachdev, K. Fujita
Nature Physics 12, 150
published article - download PDF

Differential Conductance and Defect States in the Heavy Fermion Superconductor CeCoIn5

John S. Van Dyke, J. C. Séamus Davis, Dirk K. Morr
Phys. Rev. B 93, 041107(R)
published article - download PDF

2015

Supercooled spin liquid state in the frustrated pyrochlore Dy2Ti2O7

Ethan R. Kassner, Azar B. Eyvazov, Benjamin Pichler, Timothy J. S. Munsie, Hanna A. Dabkowska, Graeme M. Luke, and J. C. Séamus Davis
Proc. Nat'l. Acad. Sci. 112, 8549
published article - download PDF

Imaging atomic-scale effects of high-energy ion irradiation on superconductivity and vortex pinning in Fe(Se,Te) 

Freek Massee, Peter Oliver Sprau, Yong-Lei Wang, J. C. Séamus Davis, Gianluca Ghigo, Genda Gu, Wai-Kwong Kwok
Science Advances 1, e1500033
published article - download PDF

Imaging Dirac-mass disorder from magnetic dopant atoms in the ferromagnetic topological insulator Crx(Bi0.1Sb0.9)2-xTe3

Inhee Lee, Chung Koo Kim, Jinho Lee, Simon J. L. Billinge, Ruidan Zhong, John A. Schneeloch, Tiansheng Liu, Tonica Valla, John M. Tranquada, Genda Gu, and J. C. Séamus Davis
Proc. Nat'l. Acad. Sci. 112, 1316
published article - download PDF

Identifying the 'fingerprint' of antiferromagnetic spin fluctuations in iron pnictide superconductors

M. P. Allan, Kyungmin Lee, A. W. Rost, M. H. Fischer, F. Massee, K. Kihou, C. -H. Lee, A. Iyo, H. Eisaki, T. -M. Chuang, J. C. Davis and Eun-Ah Kim
Nature Physics 11, 177
published article - download PDF

2014

Spectroscopic Imaging STM: Atomic-scale visualization of electronic structure and symmetry in underdoped cuprates

Fujita, M. Hamidian, I. Firmo, S. Mukhopadhyay, C. K. Kim, H. Eisaki, S. Uchida, J. C. Davis
Chapter 3Strongly Correlated Systems - Experimental Techniques by Springer (ISBN 978-3-662-44132-9)

Direct evidence for a magnetic f-electron mediated Cooper pairing mechanism of
heavy fermion superconductivity in CeCoIn5

J. Van Dyke, F. Massee, M. P. Allan, J. C. Davis, C. Petrovic, and D.K. Morr
Proc. Nat'l. Acad. Sci. 111, 11663
published article - download PDF

Direct phase-sensitive identification of a d-form factor density wave in underdoped cuprates

K. Fujita, M. H. Hamidian, S. D. Edkins, Chung Koo Kim, Y. Kohsaka, M. Azuma, M. Takano, H. Takagi, H. Eisaki, S. Uchida, A. Allais, M. J. Lawler, E. -A. Kim, S. Sachdev, J. C. Séamus Davis
Proc. Nat'l. Acad. Sci. 111, E3026
published article - download PDF

Simultaneous transitions in cuprate momentum-space topology and electronic symmetry breaking

K. Fujita, Chung Koo Kim, Inhee Lee, Jinho Lee, M. H. Hamidian, I. A. Firmo, S. Mukhopadhyay, H. Eisaki, S. Uchida, M. J. Lawler, E. -A. Kim, and J. C. Davis
Science 344, 612 (May 2014)
published article - download PDF

Iron-based superconductors: Enigmatic nematic

J. C. Davis and P. J. Hirschfeld
Nature Physics 10, 184
published article - download PDF

2013

Evidence from tunneling spectroscopy for a quasi-one-dimensional origin of superconductivity in Sr2RuO4

I. A. Firmo, S. Lederer, C. Lupien, A. P. Mackenzie, J. C. Davis, and S. A. Kivelson
Phys. Rev. B 88, 134521
published article - download PDF

Concepts relating magnetic interactions, intertwined electronic orders and strongly correlated superconductivity

J. C. Davis, D. -H. Lee
Proc. Nat'l. Acad. Sci. 110, 17623
published article - download PDF

Imaging Cooper Pairing of Heavy Fermions in CeCoIn5

M. P. Allan, F. Massee, D. K. Morr, J. van Dyke, A.W. Rost, A. P. Mackenzie, C. Petrovic, J. C. Davis
Nature Physics 9, 468
published article - download PDF

Anisotropic impurity states, quasiparticle scattering and nematic transport in underdoped Ca(Fe1-xCox)2As2

M. P. Allan, T. -M. Chuang, F. Massee, Yang Xie, Ni Ni, S. L. Bud'ko, G. S. Boebinger, Q.Wang, D. S. Dessau, P. C. Canfield, M. S. Golden, J. C. Davis
Nature Physics 9, 220
published article - download PDF

2012

Resonant soft X-ray scattering, stripe order, and the electron spectral function in cuprates

P. Abbamonte, E. Demler, J. C. Davis, J. C. Campuzano
Physica C 481, 15
published article - download PDF

Generalized Rotational Susceptibility Studies of Solid 4He

V. Gadagkar, E. J. Pratt, B. Hunt, M. Yamashita, M. J. Graf, A. V. Balatsky, J. C. Davis
J. Low Temp. Physics 169, 180
published article - download PDF

Visualization of the emergence of the pseudogap state and the evolution to superconductivity in a lightly hole-doped Mott insulator

Y. Kohsaka, T. Hanaguri, M. Azuma, M. Takano, J. C. Davis, H. Takagi
Nature Physics 8, 534
published article - download PDF

Picometer registration of zinc impurity states in Bi2Sr2CaCu2O8+δ for phase determination in intra-unit-cell Fourier transform STM

M. H. Hamidian, I. A. Firmo, K. Fujita, S. Mukhopadhyay, J. W. Orenstein, H. Eisaki, S. Uchida, M. J. Lawler, E. -A. Kim, J. C. Davis
New Journal of Physics 14, 053017
published article - download PDF

Anisotropic energy gaps of Iron-based superconductivity from intraband quasiparticle interference in LiFeAs

M. P. Allan, A. W. Rost, A. P. Mackenzie, Yang Xie, J. C. Davis, K. Kihou, C. H. Lee, A. Iyo, H. Eisaki, T. -M. Chuang
Science 336, 563  
published article - download PDF

2011

Spectroscopic Imaging Scanning Tunneling Microscopy Studies of Electronic Structure in the Superconducting and Pseudogap Phases of Cuprate High-Tc Superconductors

K. Fujita, A. R. Schmidt, E.-A. Kim, M. J. Lawler, D.-H. Lee, J. C. Davis, H. Eisaki, S. Uchida
J. Phys. Soc. Jpn. 81, 011005
published article - download PDF

How Kondo-holes create intense nanoscale heavy-fermion hybridization disorder

M. H. Hamidian, A. R. Schmidt, I. A. Firmo, M. P. Allan, P. Bradley, J. D. Garrett, T. J. Williams, G. M. Luke, Y. Dubi, A. V. Balatsky, J. C. Davis
Proc. Nat'l. Acad. Sci. 108, 18233
published article - download PDF

Topological defects coupling smectic modulations to intra-unit-cell nematicity in cuprates

A. Mesaros, K. Fujita, H. Eisaki, S. Uchida, J. C. Davis, S. Sachdev, J. Zaanen, M. J. Lawler, Eun-Ah Kim
Science 333, 426
published article - download PDF

Interplay of rotational, relaxational, and shear dynamics in solid 4He

E. J. Pratt, B. Hunt, V. Gadagkar, M. Yamashita, M. J. Graf, A. V. Balatsky, J. C. Davis
Science 332, 821  
published article - download PDF

Electronic Structure of the Cuprate Superconducting and Pseudogap Phases from Spectroscopic Imaging STM

A. R. Schmidt, K. Fujita, E. -A. Kim, M. J. Lawler, H. Eisaki, S. Uchida, D. -H. Lee, J. C. Davis
New Journal of Physics 13, 065014  
published article - download PDF

2010

Intra-unit-cell electronic nematicity of the High-Tc copper-oxide pseudogap states

M. J. Lawler, K. Fujita, Jhinhwan Lee, A. R. Schmidt, Y. Kohsaka, Chung Koo Kim, H. Eisaki, S. Uchida, J. C. Davis, J. P. Sethna & Eun-Ah Kim
Nature 466, 374
published article - download PDF

Imaging the Fano lattice to 'hidden order' transition in URu2Si2

A. R. Schmidt, M. H. Hamidian, P. Wahl, F. Meier, A. V. Balatsky, J. D. Garrett, T. J.Williams, G. M. Luke & J. C. Davis
Nature 465, 570
published article - download PDF

Nematic Electronic Structure in the "Parent" State of the Iron-Based Superconductor Ca(Fe1-xCox)2As2

T. -M. Chuang, M. P. Allan, Jinho Lee, Yang Xie, Ni Ni, S. L. Bud'ko, G. S. Boebinger, P. C. Canfield, J. C. Davis
Science 333, 426
published article - download PDF

2009

Heavy d-electron quasiparticle interference and real-space electronic structure of Sr3Ru2O7

Jinho Lee, M. P. Allan, M. A.Wang, J. Farrell, S. A. Grigera, F. Baumberger, J. C. Davis and A. P. Mackenzie
Science 325, 1099 
published article download PDF

Spectroscopic Fingerprint of Phase-Incoherent Superconductivity in the Cuprate Pseudogap State

Jhinhwan Lee, K. Fujita, A. R. Schmidt, Chung Koo Kim, H. Eisaki, S. Uchida, J. C. Davis
Science 325, 1099 
published article download PDF

Evidence for a superglass state in solid 4He

B. Hunt, E. Pratt, V. Gadagkar, M. Yamashita, A. V. Balatsky, J. C. Davis
Science 324, 632 
published article download PDF

2008

Bogoliubov angle and visualization of particle-hole mixture in superconductors

K. Fujita, I. Grigorenko, J. Lee, J. X. Zhu, J. C. Davis, H. Eisaki, S. Uchida, A. V. Balatsky
Phys. Rev. B 78, 054510 
published article download PDF

Cuprate High-Tc superconductors (review article, cover story)

Kyle M.Shen and J. C. Davis
Materials Today 11, 14-21 
published article download PDF

How Cooper pairs vanish approaching the Mott insulator in Bi2Sr2CaCu2O8+δ

Y. Kohsaka, C. Taylor, P. Wahl, A. Schmidt, Jhinhwan Lee, K. Fujita, J. W. Alldredge, K. McElroy, Jinho Lee, H. Eisaki, 
S. Uchida, D.-H. Lee & J. C. Davis
Nature 454, 1072-1078 
published article download PDF

Evolution of the electronic excitation spectrum with strongly diminishing hole density in superconducting Bi2Sr2CaCu2O8+δ

J.W. Alldredge, Jinho Lee, K. McElroy, M. Wang, K. Fujita, Y. Kohsaka, C. Taylor, H. Eisaki, S. Uchida, P. J. Hirschfeld and J. C. Davis
Nature Physics 4, 319-326 
published article download PDF

 Imaging the impact on cuprate superconductivity of varying the interatomic distances within individual crystal unit cells

J. A. Slezak, Jinho Lee, M. Wang, K. McElroy, K. Fujita, B. M. Anderson, P. J. Hirschfeld, H. Eisaki, S. Uchida, J. C. Davis
Proc. Nat'l. Acad. Sci., 0706795105 
published article download PDF

2007

Quasiparticle interference and superconducting gap in Ca2-xNaxCuO2Cl2

T. Hanaguri, Y. Kohsaka, J. C. Davis, C. Lupien, I. Yamada, M. Azuma, M. Takano, K. Ohishi, M. Ono, H. Takagi
Nature Physics 3, 865-871 
published article download PDF

Low-energy spectroscopic mapping studies in optimally-doped Ca2-xNaxCuO2Cl2

T. Hanaguri, Y. Kohsaka, J. C. Davis, C. Lupien, I. Yamada, M. Azuma, M. Takano, K. Ohishi, H. Takagi
Physica C 460, 954 
published article download PDF

An Intrinsic Bond-Centered Electronic Glass with Unidirectional Domains in Underdoped Cuprates

Y. Kohsaka, C. Taylor, K. Fujita, A. Schmidt, C. Lupien, T. Hanaguri, M. Azuma, M. Takano, H. Eisaki, H. Takagi, 
S. Uchida, J. C. Davis
Science 315, 1380-1385 
published article cover story - download PDF

2006

The Ground State of the Pseudogap in Cuprate Superconductors

T. Valla, A. V. Fedorov, Jinho Lee, J. C. Davis, G. D. Gu
Science 314, 1914-1916 
published article - download PDF

Effects of Pairing Potential Scattering on Fourier-Transformed Inelastic Tunneling Spectra of High-Tc Cuprate Superconductors with Bosonic Modes

J.-X. Zhu, K. McElroy, J. Lee, T. P. Devereaux, Q. Si, J. C. Davis, and A. V. Balatsky
Phys. Rev. Lett. 97, 177001 
published article download PDF

Interplay of Electron-Lattice Interactions and Superconductivity in Bi2Sr2CaCu2O8+δ

Jinho Lee, K. Fujita, K. McElroy, J. A. Slezak, M. Wang, Y. Aiura, H. Bando, M. Ishikado, T. Masui, J.-X. Zhu, A. V. Balatsky, H. Eisaki, S. Uchida, and J. C. Davis
Nature 442, 546-550 
published article - download PDF

2005

Atomic-Scale Sources and Mechanism of the Nanoscale Electronic Disorder in Bi2Sr2CaCu2O8+δ

K. McElroy, Jinho Lee, J. A. Slezak, D.-H. Lee, H. Eisaki, S. Uchida, and J. C. Davis
Science 309, 1048-1052 
published article - download PDF

Cuprate High-Tc superconductors (review article, cover story)

Kyle M.Shen and J. C. Davis
Materials Today 11, 14-21 
published article download PDF

Spectroscopic imaging STM studies of high-Tc superconductivity

Jinho Lee, James A. Slezak, and J. C. Davis
J. Phys. Chem. Solids 66, 1370 
published article download PDF

Coincidence of Checkerboard Charge Order and Antinodal State Decoherence in Strongly Underdoped Superconducting Bi2Sr2CaCu2O8+δ

K. McElroy, D.-H. Lee, J. E. Hoffman, K. M. Lang, J. Lee, E. W. Hudson, H. Eisaki, S. Uchida, and J. C. Davis
Phys. Rev. Lett. 94, 197005 
published article - download PDF

2004

A 'checkerboard' electronic crystal state in lightly hole-doped Ca2-xNaxCuO2Cl2

T. Hanaguri, C. Lupien, Y. Kohsaka, D. -H. Lee, M. Azuma, M. Takano, H. Takagi & J. C. Davis
Nature 430, 1001-1005 
published article - download PDF

2003

Vortex-induced quasi-particle 'checkerboard' in Bi2Sr2CaCu2O8+δ

J. E. Hoffman, E. W. Hudson, K. M. Lang, H. Eisaki, S. Uchida, and J. C. Davis.
Physica C 388-389, 703-704 
published article download PDF

Incommesurate, dispersive, density of states modulations in Bi2Sr2CaCu2O8+δ

K. McElroy, J. E. Hoffman, D. -H. Lee, K. M. Lang, H. Eisaki, S. Uchida & J.C. Davis.
Physica C 388-389, 225-226 
published article - download PDF

Relating atomic scale electronice phenomena to wave-like quasiparticle states in supercondconducting Bi2Sr2CaCu2O8+δ

K. McElroy, R. W. Simmonds, J. E. Hoffman, D. -H. Lee, J. Orenstein, H. Eisaki, S. Uchida, & J. C. Davis
Nature 422, 592-596 
published article - download PDF

2002

Imaging quasiparticle interference in Bi2Sr2CaCu2O8+δ

J. E. Hoffman, K. McElroy, D-H Lee, K.M. Lang, H. Eisaki, S. Uchida, and J.C. Davis.
Science 297, 1148-1151
published article - download PDF

Superfluid 3He Josephson weak links

J. C. Davis & R. E. Packard.
Rev. Mod. Phys. 74, 741 
published article download PDF

Individual impurity atoms on view in the cuprates

J. C. Davis
Materials Today 5 issue 4, 24 
published article - download PDF

Nanocale one-dimensional scattering resonances in the CuO chains in YBa2Cu3O6+x  

D. J. Derro, E. W. Hudson, K. M. Lang, S. H. Pan, J. C. Davis, J. T. Markert, and A. de Lozanne
Phys. Rev. Lett. 88, 97002 
published article download PDF

Ballistic effusion transport of normal 3He through nanometer apertures

R. W. Simmonds, A. Marchenkov, J. C. Davis and R. E. Packard
Phys. Rev. B. 65, 075414 
published article download PDF

Imaging the granular structure of high-Tc superconductivity in underdoped Bi2Sr2CaCu2O8+δ

K. M. Lang, V. Madhavan, J. E. Hoffman, E. W. Hudson, H. Eisaki, S. Uchida, J. C. Davis
Nature 415, 412-416 
published article - download PDF

A four unit cell periodic pattern of quasi-particle states surrounding vortex Cores in Bi2Sr2CaCu2O8+δ

J. E. Hoffman, E. W. Hudson, K. M. Lang, V. Madhavan, H. Eisaki, S. Uchida, J. C. Davis
Science 295, 466-469 
published article - download PDF

2001

Microscopic electronic inhomogeneity in the high-Tc superconductor Bi2Sr2CaCu2O8+δ

S. H. Pan, J. P. O'Neal, R. L. Badzey, C. Chamon, H. Ding, J. R. Engelbrecht, Z. Wang, H. Eisaki, S. Uchida, A. K. Gupta, K.-W. Ng, E. W. Hudson, K. M. Lang & J. C. Davis
Nature 413, 282-285 
published article download PDF

Quantum interference of superfluid 3He

R. W. Simmonds, A. Marchenkov, E. Hoskinson, J. C. Davis and R. E. Packard
Nature 412, 55-58 
published article download PDF

Interplay of magnetism and high-Tc superconductivity at individual magnetic impurity atoms in Bi2Sr2CaCu2O8+δ

E. W. Hudson, K. M. Lang, V. Madhavan, S. H. Pan, H. Eisaki, S. Uchida & J. C. Davis
Nature 411, 920-924 
published article download PDF

Observation of The Shapiro Effect in a Superfluid 3He Weak Link

R. W. Simmonds, A. Marchenkov, R. E. Packard and J. C. Davis
Phys. Rev. Lett. 87, 035301 
published article - download PDF

2000

STM of quasiparticle scattering resonances in Bi2Sr2CaCu2O8+δ

E. W. Hudson, S. H. Pan, K. M. Lang, A. K. Gupta, K. -W. Ng and J. C. Davis
Physica B 284-288, 969-970 
published article download PDF

Quality factor of a superfluid 3He weak link resonator

R. W. Simmonds, A. Marchenkov, J. C. Davis and R. E. Packard
Physica B 284-288, 283-284 
published article download PDF

Equilibrium thickness of saturated superfluid 3He films on a Copper substrate

A. M. R. Schechter, J. A. Hoffmann, R. E. Packard and J. C. Davis
Physica B 284-288, 275-276 
published article download PDF

NMR measurements of superfluid 3He-A in cylindrical cell under rotation

O. Ishikawa, R. Ishiguro, K. Fukuda, Y. Sasaki, T. Takagi, T. Ohmi, T. Mizusaki, A. Marchenkov, J. C. Davis and R. E. Packard
Physica B 284-288, 248-249 
published article download PDF

Effect of 4He pre-plating on third sound in superfluid 3He

A. M. R. Schechter, R. W. Simmonds, R. E. Packard and J. C. Davis
Physica B 280, 132-133 
published article download PDF

Imaging the Effects of Individual Zinc Impurity Atoms on Superconductivity in Bi2Sr2CaCu2O8+δ

S. H. Pan, E. W. Hudson, K. M. Lang, H. Eisaki, S. Uchida, and J. C. Davis
Nature 403, 746 
published article download PDF

Observation of the Josephson Plasma Mode for a Superfluid 3He Weak Link

R. W. Simmonds, A. Marchenkov, S. Vitale, J. C. Davis, and R. E. Packard
Phys. Rev. Lett. 84, 6062 
published article - download PDF

New Flow Dissipation Mechanisms in Superfluid 3He

A. Marchenkov, R. W. Simmonds, A. Loshak, J. C. Davis, and R. E. Packard
Phys. Rev. B. 61, 4196 
published article download PDF

STM studies of The Electronic Structure of Vortex Cores in Bi2Sr2CaCu2O8+δ

S. H. Pan, E. W. Hudson, A. K. Gupta, K.-W. Ng, H. Eisaki, S. Uchida, J. C. Davis
Phys. Rev. Lett. 85, 1536 
published article download PDF

A Detailed Scanning Tunneling Microscopy Study of the CuO chains of YBa2Cu3O7-x

D. J. Derro, S. H. Pan, E. W. Hudson, K.M. Lang, J. C. Davis, K. Mochizuki, J. T. Markert, and A. de Lozanne
Physica C 341-348, 425-428 
published article download PDF

1999

Bi-state Superfluid 3He Weak Links and the Stability of Josephson π-states

A. Marchenkov, R. W. Simmonds, S. Backhaus, K. Shokhirev, A. Loshak, J. C. Davis, and R. E. Packard
Phys. Rev. Lett. 83, 3860 
published article download PDF

Atomic-Scale Quasi-Particle Scattering Resonances in Bi2Sr2CaCu2O8+δ

E. W. Hudson, S. H. Pan, A. K. Gupta, K. -W. Ng, and J. C. Davis
Science 285, 88-91 
published article download PDF

3He Refrigerator Based Very Low Temperature Scanning Tunneling Microscope

S. H. Pan, E. W. Hudson, and J. C. Davis
Rev. Sci. Instrum. 70, 1459 
published article download PDF

Search for Superconductivity in Lithium

K. M. Lang, Ari Mizel, J. Mortara, E. Hudson, J. Hone, Marvin L. Cohen, A. Zettl, J. C. Davis
J. Low Temp. Phys. 114, 445 
published article download PDF

1998

Observation of 'third-sound' in superfluid 3He

A. M. R. Schechter, R. W. Simmonds, R. E. Packard, J. C. Davis
Nature 396, 554-557 
published article download PDF

Vacuum tunneling of superconducting quasiparticles from atomically sharp STM tips

S. H. Pan, E. W. Hudson, and J. C. Davis
Appl. Phys. Lett. 73, 2992 
published article download PDF

DC supercurrents from resonant mixing of Josephson oscillations in a 3He weak link

R. W. Simmonds, A. Loshak, A. Marchenkov, S. Backhaus, S. Pereversev, S. Vitale, J. C. Davis, and R. E. Packard
Phys. Rev. Lett. 81, 1247 
published article download PDF

Imaging and identification of atomic planes of cleaved Bi2Sr2CaCu2O8+δ  by high resolution Scanning Tunneling Microscopy

S. H. Pan, E. W. Hudson, J. Ma and J. C. Davis
Appl. Phys. Lett. 73, 58-60 
published article download PDF

Discovery of a metastable π-state in a superfluid 3He weak link

S. Backhaus, R. W. Simmonds, S.V. Pereversev, A. Loshak, J. C. Davis & R. E. Packard
Nature 392, 687-690 
published article download PDF

Capacitive generation and detection of third sound in saturated superfluid 4He films

A. M. R. Schechter, R. W. Simmonds, J. C. Davis
J. Low Temp. Phys. 110, 603 
published article download PDF

1997

Direct measurement of the current-phase relationship of a superfluid 3He weak link

S. Backhaus, S. V. Pereverzev, A. Loshak, J. C. Davis & R. E. Packard
Science 278, 1435-1438 
published article download PDF

Thermoviscous effects in steady and oscillating flow of superfluid 4He: Experiments

S. Backhaus, K. Schwab, A. Loshak, S. Pereverzev, N. Bruckner, J.C. Davis & R.E. Packard
J. Low Temp. Phys. 109, 527 
published article - download PDF

Quantum oscillations between two weakly coupled reservoirs of superfluid 3He

S. V. Pereverzev, A. Loshak, S. Backhaus, J. C. Davis and R. E. Packard
Nature 388, 449 
published article download PDF

1996

Fabrication of a Silicon based Superfluid Oscillator

K. Schwab, J. Steinhauer, J. C. Davis and R. E. Packard
J. of Microelectromechanical Syst. 5, 180 

Effect of vibrations on microaperture flow experiments in superfluid Helium

S. Pereverzev and J. C. Davis
Proceedings of LT21 Conference, Czechoslovak Journal of Physics 46, 2739 

Study of an array of superfluid 3He weak links

Yury M. Mukharsky, A. Loshak, K. Schwab, J. C. Davis and R. E. Packard
Proceedings of LT21 Conference, Czechoslovak Journal of Physics 46, 115 

A very low temperature vibration isolator

E. W. Hudson, Claudia YiLeon, S. Pan, R. W. Simmonds, and J. C. Davis
Proceedings of LT21 Conference, Czechoslovak Journal of Physics 46, 2737 

 A Microfabricated Superfluid 4He RF Squid

Keith Schwab, J. C. Davis and R. E. Packard
Proceedings of LT21 Conference, Czechoslovak Journal of Physics 46, 109

1995

The Determination of the Energy Barrier for Phase Slips in superfluid 4He

J. Steinhauer, K. Schwab, Y. Mukharsky, J. C. Davis and R. E. Packard
J. Low Temp. Phys. 100, 281 
published article

Vortex nucleation in Superfluid 4He

J. Steinhauer, K. Schwab, Yu. M. Mukharsky, J. C. Davis, and R. E. Packard
Phys. Rev. Lett. 74, 5056 
published article download PDF

A mechanical measurement of textural relaxation in supe rfluid 3He-A at very low temperatures

R. J. Zieve, Yu. M. Mukharsky, J. C. Davis and R. E. Packard
J. Low Temp. Phys. (Rapid Comm.) 99, 1

1994

Phase slip phenomena in Superfluid Helium

R. E. Packard and J. C. Davis
Physica B 197, 315 
published article

The characteristic response curve, I(ΔP), of a 3He weak link

Yi Zhang, A. Mesaros, K. Fujita, S. D. Edkins, M. H. Hamidian, K. Ch'ng, H. Eisaki, S. Uchida, J. C. Séamus Davis, E. Khatami, Eun-Ah Kim
Physica B 194-196, 767 
published article

Effect of 3He impurities on the nucleation of phase slips in superfluid 4He

Yu. M. Mukharsky, K. Schwab, J. Steinhauer, J. C. Davis, and R. E. Packard
Physica B 194-196, 591 
published article

1993

Investigations of quantized circulation in superfluid 3He-B

R. J. Zieve, Yu. M. Mukharsky, J. D. Close, J. C. Davis and R. E. Packard
J. Low Temp. Phys. 91, 315 
published article

New experiments on quantized circulation in superfluid 4He

R. J. Zieve, J. D. Close, J. C. Davis and R. E. Packard
J. Low Temp. Phys. 90, 243 
published article

Fabrication of submicron apertures in thin membranes of silicon nitride

A. Amar, Y. Sasaki, R.L. Lozes, J. C. Davis and R. E. Packard
J. of Vac. Sci. and Technol. B 11, 259 
published article

1992

Stable circulation in superfluid 3He-A

R.J. Zieve, Yu. M. Mukharsky, J.D. Close, J. C. Davis and R. E. Packard
J. Low Temp. Phys. 89, 47 
published article

Evidence for quantum tunneling of phase-slip vortices in superfluid 4He

J. C. Davis, J. Steinhauer, K. Schwab, Yu. M. Mukharsky, A. Amar, Y. Sasaki and R. E. Packard
Phys. Rev. Lett. 69, 323 
published article - download PDF

Quantized Phase Slippage in superfluid 4He

A. Amar, Y. Sasaki, R. L. Lozes, J. C. Davis and R. E. Packard
Phys. Rev. Lett. 68, 2624 
published article download PDF

Precession of a Single Vortex in superfluid 3He-B

R. J. Zieve, Yu. M. Mukharsk y, J. D. Close, J. C. Davis, and R. E. Packard
Phys. Rev. Lett. 68, 1327 
published article download PDF

Experiments on Quantized Circulation in superfluid 3He

J. C. Davis, J. D. Close, R. J. Zieve, and R. E. Packard
Physica B 178, 73 
published article

1991

The Superfluid Helium Interference Gyroscope; An emerging technology for Earth's rotation studies

J. C. Davis and R. E. Packard
Proceedings of the Chapman Conference on Geodetic VLBI 

Observation of Quantized Circulation in Superfluid 3He-B

J. C. Davis, J. D. Close, R. J. Zieve and R. E. Packard
Phys. Rev. Lett. 66, 329 
published article download PDF

Measurements of Circulation in superfluid 3He using a vibrating wire

J. C. Davis, R. J. Zieve, J. D. Close and R. E. Packard
Physica B 169, 523 
published article

1990

Phase Slips in the flow of Superfluid 4He through a submicron orifice

A. Amar, J. C. Davis, R. E. Packard and R. Lozes
Physica B 165-166, 753 
published article

Continuously pumped Rotating Millikelvin Cryostat

J. D. Close, R. J. Zieve, J. C. Davis and R. E. Packard
Physica B 165-166, 57 
published article

Quantum Matter

Room 304, 3rd floor, Physics Department, University College Cork, Cork, Ireland,

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