Heat capacity jump at Tc and pressure derivatives of superconducting transition temperature in the Ba1-xK xFe2As2 (0.2≤x≤1.0) series

Sergey L. Bud'ko, Mihai Sturza, Duck Young Chung, Mercouri G Kanatzidis, Paul C. Canfield

Research output: Contribution to journalArticle

32 Citations (Scopus)

Abstract

We present the evolution of the initial (up to ∼10 kbar) hydrostatic pressure dependencies of Tc 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∼0.7. In the same concentration region, ΔC p|Tc deviates from the ΔCpâ̂T3 scaling found for most BaFe2As2-based superconductors. These results are consistent with a possible significant modification of the superconducting state, occurring near x∼0.7.

Original languageEnglish
Article number100509
JournalPhysical Review B - Condensed Matter and Materials Physics
Volume87
Issue number10
DOIs
Publication statusPublished - Mar 22 2013

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Superconducting transition temperature
Specific heat
transition temperature
specific heat
Derivatives
Hydrostatic pressure
hydrostatic pressure
Superconducting materials
Doping (additives)
anomalies
scaling
iron
Iron-based Superconductors

ASJC Scopus subject areas

  • Condensed Matter Physics
  • Electronic, Optical and Magnetic Materials

Cite this

Heat capacity jump at Tc and pressure derivatives of superconducting transition temperature in the Ba1-xK xFe2As2 (0.2≤x≤1.0) series. / Bud'ko, Sergey L.; Sturza, Mihai; Chung, Duck Young; Kanatzidis, Mercouri G; Canfield, Paul C.

In: Physical Review B - Condensed Matter and Materials Physics, Vol. 87, No. 10, 100509, 22.03.2013.

Research output: Contribution to journalArticle

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