Campus Units

Physics and Astronomy, Ames Laboratory

Document Type

Article

Publication Version

Published Version

Publication Date

5-1-2010

Journal or Book Title

Physical Review B

Volume

81

Issue

18

First Page

180506(R)

DOI

10.1103/PhysRevB.81.180506

Abstract

CaFe2As2 single crystals under uniaxial pressure applied along the c axis exhibit the coexistence of several structural phases at low temperatures. We show that the room-temperature tetragonal phase is stabilized at low temperatures for pressures above 0.06 GPa, and its weight fraction attains a maximum in the region where superconductivity is observed under applied uniaxial pressure. Simultaneous resistivity measurements strongly suggest that this phase is responsible for the superconductivity in CaFe2As2 found below 10 K in samples subjected to nonhydrostatic pressure conditions.

Comments

This article is published as Prokeš, K., A. Kreyssig, B. Ouladdiaf, D. K. Pratt, N. Ni, S. L. Bud’Ko, P. C. Canfield, R. J. McQueeney, D. N. Argyriou, and A. I. Goldman. "Evidence from neutron diffraction for superconductivity in the stabilized tetragonal phase of CaFe 2 As 2 under uniaxial pressure." Physical Review B 81, no. 18 (2010): 180506(R). DOI: 10.1103/PhysRevB.81.180506. Posted with permission.

Copyright Owner

American Physical Society

Language

en

File Format

application/pdf

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