Document Type

Article

Publication Date

7-31-2008

Journal or Book Title

Physical Review Letters

Volume

101

First Page

057006

DOI

10.1103/PhysRevLett.101.057006

Abstract

CaFe2As2 has been found to be exceptionally sensitive to the application of hydrostatic pressure and can be tuned to reveal all the salient features associated with FeAs superconductivity without introducing any disorder. The ambient pressure, 170 K, structural/magnetic, first-order phase transition is suppressed to 128 K by 3.5 kbar. At 5.5 kbar a new transition is detected at 104 K, increasing to above 300 K by 19 kbar. A low temperature, superconducting dome (Tc∼12  K) is centered around 5 kbar, extending down to 2.3 kbar and up to 8.6 kbar. This superconducting phase appears to exist when the low pressure transition is suppressed sufficiently, but before the high pressure transition has reduced the resistivity too dramatically.

Comments

This article is from Physical Review Letters 101 (2008): 057006, doi:10.1103/PhysRevLett.101.057006.

Copyright Owner

American Physical Society

Language

en

File Format

application/pdf

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