Surface reconstruction and energy gap of superconducting V3Si(001)

N. Hauptmann; M. Becker; J. Kröger; R. Berndt

doi:10.1103/PhysRevB.79.144522

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Surface reconstruction and energy gap of superconducting V3Si(001)

N. Hauptmann, M. Becker, J. Kröger, R. Berndt

DOI 10.1103/PhysRevB.79.144522 · Physical Review B

T1

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Abstract

A yet unknown surface reconstruction of V3Si(001), which is most likely induced by carbon, is used to investigate the quasiparticle energy gap at the atomic scale by a cryogenic scanning tunneling microscope. The width of the gap was virtually not altered at and close to carbon impurities nor did it change at different sites of the reconstructed surface lattice. A remarkable modification of the spectroscopic signature of the gap was induced, however, upon moving the tip of the microscope into controlled contact with the superconductor. Spectroscopy of the resulting normal-metal-superconductor junction indicated the presence of Andreev reflections.

Source-reported materials — not catalogue approval

Formula	Reported Tc (K)	Pressure (GPa)	Type
V3Si Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula.	17	Pressure not reported	unknown
V3Si Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula.	—	Pressure not reported	unknown