Campus Units

Physics and Astronomy, Ames Laboratory

Document Type

Article

Publication Version

Published Version

Publication Date

6-1-2013

Journal or Book Title

Physical Review B

Volume

87

Issue

21

First Page

214504

DOI

10.1103/PhysRevB.87.214504

Abstract

We present very low temperature (0.15 K) scanning tunneling microscopy and spectroscopy experiments in the layered superconductor LaSb2. We obtain topographic microscopy images with surfaces showing hexagonal and square atomic size patterns, and observe in the tunneling conductance a superconducting gap. We find well defined quasiparticle peaks located at a bias voltage comparable to the weak coupling s-wave BCS expected gap value (0.17 meV). The amount of states at the Fermi level is however large and the curves are significantly broadened. We find Tc of 1.2 K by following the tunneling conductance with temperature.

Comments

This article is published as Galvis, J. A., H. Suderow, S. Vieira, S. L. Bud'ko, and P. C. Canfield. "Scanning tunneling microscopy in the superconductor LaSb 2." Physical Review B 87, no. 21 (2013): 214504. DOI: 10.1103/PhysRevB.87.214504. Posted with permission.

Copyright Owner

American Physical Society

Language

en

File Format

application/pdf

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