Pressure induced dimensional crossing in a quasi-one-dimensional superconductor

ORAL

Abstract

Low-dimensional superconductors have been a fertile playground for the research of exotic superconductivity. In this talk, I will present our recent work on the effect of uniaxial strain and hydrostatic pressure on a quasi-one-dimensional topological superconductor candidate. When the tensile strain up to 1.2% is applied on the one-dimensional chain direction, broadening of the superconductor transition was observed with the superconducting temperature Tc remaining almost the same. When hydrostatic pressure up to 1.65 GPa is applied, the Tc first remains the same and then slowly decreases. Measurements have shown a strong Hc2 anisotropy at ambient pressure while upon the increasing pressure, the anisotropy was hugely suppressed with an isotropic nature. We will discuss the origin of this dimensional cross and its implication on possible topological superconductivity.

* Work at UCLA was supported by the U.S. Department of Energy (DOE), Office of Science, Office of Basic Energy Sciences under Award Number DE-SC0021117.

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Presenters

  • Tiema Qian

    University of California, Los Angeles

Authors

  • Tiema Qian

    University of California, Los Angeles

  • Yongjian Wang

    University of cologne, University of Cologne

  • Sougata Mardanya

    Howard University, Howard university

  • Barun Ghosh

    Northeastern University, Boston, USA

  • Igor I Mazin

    George Mason University, Department of Physics and Astronomy, George Mason University; Quantum Science and Engineering Centre, George Mason University

  • Sugata Chowdhury

    Howard University

  • Yoichi Ando

    Univ Cologne, University of Cologne

  • Ni Ni

    University of California, Los Angeles