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Article
Pressure Induced Superconductivity in CaFe2As2
Physical Review Letters
  • Milton S. Torikachvili, San Diego State University
  • Sergey L. Bud'ko, Iowa State University
  • Ni Ni, Iowa State University
  • Paul C. Canfield, Iowa State University
Document Type
Article
Publication Date
7-31-2008
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
Date Available
2014-09-07
File Format
application/pdf
Citation Information
Milton S. Torikachvili, Sergey L. Bud'ko, Ni Ni and Paul C. Canfield. "Pressure Induced Superconductivity in CaFe2As2" Physical Review Letters Vol. 101 (2008) p. 057006
Available at: http://works.bepress.com/paul_canfield/37/