Enhanced superconducting transition temperatures in the rocksalt-type superconductors In1-xSnxTe (x≤0.5) ENHANCED SUPERCONDUCTING TRANSITION ... KOBAYASHI, AI, JESCHKE, and AKIMITSU

    Research output: Contribution to journalArticlepeer-review

    11 Citations (Scopus)

    Abstract

    We investigate superconductivity in In1-xSnxTe (x≤0.5) synthesized at high pressures of up to 2 GPa and observe an enhancement of the superconducting transition temperature Tc for increasing tin concentration x. These compounds have not been accessible in rocksalt structure via conventional ambient pressure synthesis. While the lattice constant smoothly increases with x, Tc saturates around x=0.4. Electronic structure calculations indicate that the Tc modulation is brought on by the change of the density of states in the vicinity of the Fermi energy [N(EF)]. However, differences between the calculated N(EF) and the observed electronic specific-heat coefficient indicate that the phonon dispersion plays an important role in the system and that the mechanism of superconductivity may not be the same in the entire doping range.

    Original languageEnglish
    Article number104511
    Pages (from-to)104511
    JournalPhysical Review B
    Volume97
    Issue number10
    DOIs
    Publication statusPublished - Mar 26 2018

    ASJC Scopus subject areas

    • Electronic, Optical and Magnetic Materials
    • Condensed Matter Physics

    Fingerprint

    Dive into the research topics of 'Enhanced superconducting transition temperatures in the rocksalt-type superconductors In1-xSnxTe (x≤0.5) ENHANCED SUPERCONDUCTING TRANSITION ... KOBAYASHI, AI, JESCHKE, and AKIMITSU'. Together they form a unique fingerprint.

    Cite this