Anomalous pressure dependence of the superconducting transition temperature inTlNi2Se2−xSx

2014/10/09 by S. K. Goh, Swee K. Goh, H. C. Chang +16
Chemistry · Materials Science · Physics and Astronomy · #Condensed matter physics #High pressure #Inorganic Chemistry and Materials #Iron-based superconductors research #Materials science #Phase (matter) #Phase diagram #Physics #Quantum mechanics #Rare-earth and actinide compounds #Superconductivity #Thermodynamics #cond-mat.str-el #cond-mat.supr-con

paper · pdf · doi:10.1103/physrevb.90.201105

published as Phys. Rev. B 90, 201105(R) (2014) · 4 pages, 3 figures

arxiv created 2014/10/09 · openalex publication_date 2014/11/10 · arxiv updated 2014/11/13 · openalex created_date 2016/06/24 · openalex updated_date 2026/08/05

Abstract

We report the pressure dependence of the superconducting transition temperature T_c in TlNi₂Se_2\ensuremath-xS_x detected via the ac susceptibility method. The pressure-temperature phase diagram constructed for TlNi₂Se₂, TlNi₂S₂, and TlNi₂SeS exhibits two unexpected features: (a) a sudden collapse of the superconducting state at moderate pressure for all three compositions and (b) a dome-shaped pressure dependence of T_c for TlNi₂SeS. These results point to the nontrivial role of S substitution and its subtle interplay with applied pressure, as well as interesting superconducting properties of the TlNi₂Se_2\ensuremath-xS_x system.

Citations

• Superconductivity inSrNi2As2single crystals
• The puzzle of high temperature superconductivity in layered iron pnictides and chalcogenides
• Nickel-based phosphide superconductor with infinite-layer structure, BaNi2P2
• Density functional study ofBaNi2As2: Electronic structure, phonons, and electron-phonon superconductivity
• High-temperature superconductivity in iron-based materials