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Enhanced Interfacial Superconductivity by Metallic Deposition on CsV3$ m{CsV}_3$Sb5$ m{Sb}_5$
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DOI：10.1002/qute.70294.png)
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Abstract
En 中文
Entangled quantum states in kagome superconductor exhibit high sensitivity to external parameters due to the exotic electronic structures near the Fermi level. Here, significant enhancement of superconductivity is observed from point-contact experiments of , and resistance measurements of Au film coated samples. Element characteristic energy shifts toward higher binding energies are revealed by X-ray photoelectron spectroscopy, demonstrating effective hole doping at the /Au interface induced by charge transfer. Meanwhile, the violation of the Pauli limit and single band behavior of upper critical field are observed at this interface. This work elucidates the underlying mechanism of the ubiquitous superconductivity enhancement in point-contact measurements, and also facilitate the pivotal role of van Hove singularities in modulating quantum states in this system.
Keywords:
kagome superconductor
metal deposition
point-contact
interfacial superconductivity
Journal
A
IF:
4.3
Papers:
387
Citations:
3.2K
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Cited Papers