Campus Units

Physics and Astronomy, Ames Laboratory

Document Type

Article

Publication Version

Published Version

Publication Date

9-2019

Journal or Book Title

Physical Review Materials

Volume

3

Issue

9

First Page

095006

DOI

10.1103/PhysRevMaterials.3.095006

Abstract

We present a study of electrical transport properties of RBi2 (R=La,Ce) under hydrostatic pressure up to ∼2.5 GPa. These measurements are complemented by thermodynamic measurements of the specific heat on CeBi2 at different pressures up to 2.55 GPa. For CeBi2, we find a moderate increase of the antiferromagnetic transition, TN, from 3.3 K to 4.4 K by pressures up to 2.55 GPa. Notably, resistance measurements for both CeBi2 and LaBi2 show signatures of superconductivity for pressures above ∼1.7 GPa. However, the absence of superconducting features in specific-heat measurements for CeBi2 indicates that superconductivity in CeBi2 (and most likely LaBi2 as well) is not bulk and likely originates from traces of Bi flux, either on the surface of the platelike samples, or trapped inside the sample as laminar inclusions. Finally, we point out that extra caution should be exercised when claiming superconductivity based just on transport measurements, especially for Bi-containing compounds.

Comments

This article is published as Xiang, Li, Elena Gati, Kathryn Neilson, Sergey L. Bud'ko, and Paul C. Canfield. "Physical properties of R Bi 2 (R= La, Ce) under pressure." Physical Review Materials 3, no. 9 (2019): 095006. DOI: 10.1103/PhysRevMaterials.3.095006 Posted with permission.

Copyright Owner

American Physical Society

Language

en

File Format

application/pdf

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