Lower critical field, anisotropy, and two-gap features of LiFeAs

ORAL

Abstract

The magnetic properties of LiFeAs, as single crystalline and polycrystalline samples, were investigated. The lower critical field deduced from the vortex penetration of two single crystals appears to be almost isotropic with a temperature dependence closer to that of two-gap superconductors. The parameters extracted from the reversible magnetizations of sintered polycrystalline samples are in good agreement with those from the single-crystal data.

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Authors

  • Kalyan Sasmal

    Department of Physics and TCSUH, University of Houston, Houston, Texas 77204-5002, USA

  • Bing Lv

    Department of Chemistry and TCSUH, University of Houston, Houston, Texas 77204-5003, USA, TCSUH and Department of Physics, University of Houston

  • Z. Tang

    Department of Chemistry and TCSUH, University of Houston, Houston, Texas 77204-5003, USA

  • Feng Yan Wei

    Department of Physics and TCSUH, University of Houston, Houston, Texas 77204-5002, USA, TCSUH and Department of Physics, University of Houston, Texas Center for superconductivity at University of Houston Department of Physics, Texas Center for Superconductivity, University of Houston, Houston TX 77204-­5002, USA

  • Yu-Yi Xue

    Department of Physics and TCSUH, University of Houston, Houston, Texas 77204-5002, USA, TCSUH and Department of Physics, University of Houston

  • A. Guloy

    Department of Chemistry and TCSUH, University of Houston, Houston, Texas 77204-5003, USA

  • Paul Ching-Wu Chu

    Department of Physics and TCSUH, University of Houston, Houston, Texas 77204-5002;Lawrence Berkeley National Laboratory, 1 Cyclotron Road, USA, TCSUH and Department of Physics, University of Houston, Texas Center for Superconductivity, University of Houston, Houston TX 77204-­5002, USA