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University College Cork Researchers Use Caesium Atoms to Write 'UCC' on CVS Sample
Researchers at University College Cork's Macroscopic Quantum Matter Group have used a Scanning Tunnelling Microscope (STM) to write "UCC" with Caesium atoms on a CsV3Sb5 (CVS) sample.
CVS comprises layers of Caesium and Antimony weakly bonded together. In the STM's cryogenic environment, the top layer is cleaved, revealing a clean Kagome lattice with randomly scattered Caesium atoms. These atoms must be removed for a clear scan. Dr. Yan, a postdoctoral researcher, accomplished this by using an atomically sharp tip and high current to precisely remove each Caesium atom, positioning them outside the scanning field.
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