Campus Units

Physics and Astronomy, Ames Laboratory

Document Type

Article

Publication Version

Published Version

Publication Date

3-1-2013

Journal or Book Title

Physical Review B

Volume

87

Issue

10

First Page

100509

DOI

10.1103/PhysRevB.87.100509

Abstract

We present the evolution of the initial (up to similar to 10 kbar) hydrostatic pressure dependencies of T-c and of the ambient pressure jump in the heat capacity associated with the superconducting transition as a function of K doping in the Ba1-xKxFe2As2 family of iron-based superconductors. The pressure derivatives show a weak but distinct anomaly near x similar to 0.7. In the same concentration region, Delta C-p vertical bar(Tc) deviates from the Delta C-p proportional to T-3 scaling found for most BaFe2As2-based superconductors. These results are consistent with a possible significant modification of the superconducting state, occurring near x similar to 0.7.

Comments

This article is published as Bud'ko, Sergey L., Mihai Sturza, Duck Young Chung, Mercouri G. Kanatzidis, and Paul C. Canfield. "Heat capacity jump at Tc and pressure derivatives of superconducting transition temperature in the Ba1−xKxFe2As2 (0.2 <= x <= 1.0) series." Physical Review B 87, no. 10 (2013): 100509. DOI: 10.1103/PhysRevB.87.100509. Posted with permission.

Copyright Owner

American Physical Society

Language

en

File Format

application/pdf

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