Publication Date

4-1-2017

DOI

10.1103/PhysRevB.95.134505

Journal Title

Physical Review B

Volume Number

95

Issue Number

13

First Page

134505

Abstract

We image vortex creep at very low temperatures using scanning tunneling microscopy in the superconductor Rh9In4S4 (Tc=2.25K). We measure the superconducting gap of Rh9In4S4, finding Δ≈0.33meV, and image a hexagonal vortex lattice up to close to Hc2, observing slow vortex creep at temperatures as low as 150 mK. We estimate thermal and quantum barriers for vortex motion and show that thermal fluctuations likely cause vortex creep, in spite of being at temperatures T/Tc

Publisher

Iowa State University Digital Repository, Ames IA (United States)

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