Hydrostatic and uniaxial pressure dependence of superconducting transition temperature of KFe2As2 single crystals

TitleHydrostatic and uniaxial pressure dependence of superconducting transition temperature of KFe2As2 single crystals
Publication TypeJournal Article
Year of Publication2012
AuthorsBud'ko SL, Liu Y, Lograsso TA, Canfield PC
Journal TitlePhysical Review B
Volume86
Pages224514
Date Published12
Type of ArticleArticle
ISBN Number1098-0121
Accession NumberWOS:000312831800013
Keywordsbafe2as2, iron
Abstract

We present heat capacity, c-axis thermal expansion and pressure-dependent, low-field, temperature-dependent magnetization for pressures up to similar to 12 kbar, data for KFe2As2 single crystals. T-c decreases under pressure with dT(c)/dP approximate to -0.10 K/kbar. The inferred uniaxial, c-axis, pressure derivative is positive, dT(c)/dp(c) approximate to 0.11 K/kbar. The data are analyzed in comparison with those for overdoped Fe-based superconductors. Arguments are presented that superconductivity in KFe2As2 may be different from the other overdoped, Fe-based materials in the 122 family. DOI: 10.1103/PhysRevB.86.224514

URL<Go to ISI>://WOS:000312831800013
DOI10.1103/PhysRevB.86.224514