Campus Units

Physics and Astronomy, Ames Laboratory

Document Type

Article

Publication Version

Published Version

Publication Date

7-1-2016

Journal or Book Title

Physical Review B

Volume

94

Issue

2

First Page

024526

DOI

10.1103/PhysRevB.94.024526

Abstract

The study of the iron-based superconductor FeSe has blossomed with the availability of high-quality single crystals, obtained through flux/vapor-transport growth techniques below the structural transformation temperature of its tetragonal phase, T≈450∘C. Here, we report on the variation of sample morphology and properties due to small modifications in the growth conditions. A considerable variation of the superconducting transition temperature Tc, from 8.8 K to 3 K, which cannot be correlated with the sample composition, is observed. Instead, we point out a clear correlation between Tc and disorder, as measured by the residual resistivity ratio. Notably, the tetragonal-to-orthorhombic structural transition is also found to be quite strongly disorder dependent (Ts≈72–90K) and linearly correlated with Tc.

Comments

This article is published as Böhmer, A. E., V. Taufour, W. E. Straszheim, T. Wolf, and P. C. Canfield. "Variation of transition temperatures and residual resistivity ratio in vapor-grown FeSe." Physical Review B 94, no. 2 (2016): 024526. DOI: 10.1103/PhysRevB.94.024526. Posted with permission.

Copyright Owner

American Physical Society

Language

en

File Format

application/pdf

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