Heat transport study of KFe<sub>2</sub>As<i><sub>2</sub></i> in precisely oriented magnetic field. Effect of controlled disorder

ORAL

Abstract

A systematic evolution of thermal conductivity in magnetic fields parallel to [001] crystallographic axis (orbital upper critical field, Hc2) and parallel to [100] direction (Pauli limited Hc2) was studied in nodal superconductor KFe2As2. Low-temperature irradiation with relativistic 2.5 MeV electrons was used to shift from clean to dirty limit. The dirty limit response in the Zeeman case is in qualitative agreement with the predictions for linear quasi-particle density increase with magnetic field and continuous transition at Hc2, as opposite to the 1st-order transition in the clean limit.

*Supported by the US DOE, Office of Science, BES MSED under contract # DE-AC02-07CH11358.

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Presenters

  • Makariy Tanatar

    • Ames Laboratory
    • Ames Laboratory, Ames, IA
    • Ames Lab

Authors

  • Makariy Tanatar

    • Ames Laboratory
    • Ames Laboratory, Ames, IA
    • Ames Lab

  • Tristin Metz

    • Maryland Quantum Materials Center, Department of Physics, University of Maryland
    • Quantum Materials Center, University of Maryland, College Park
    • University of Maryland, College Park

  • Erik I Timmons

    • Iowa State University
    • Department of Physics and Astronomy, Iowa State University
    • Ames Laboratory/Iowa State University
    • Ames Lab

  • Yong Liu

    • Ames Lab
    • Institute of Physics, Ecole Polytechnique Federale de Lausanne
    • Ames Laboratory

  • T. A. Lograsso

    • Ames Lab

  • Xiangfeng Wang

    • Maryland Quantum Materials Center, Department of Physics, University of Maryland

  • Marcin Konczykowski

    • LSI, Ecole Polytechnique

  • olivier cavani

    • LSI, Ecole Polytechnique
    • Ecole Polytechnique

  • Kirill Samokhin

    • Physics Department, Brock University

  • Ruslan Prozorov

    • Iowa State University
    • Ames Laboratory, Ames, IA
    • Department of Physics and Astronomy, Iowa State University
    • Ames Laboratory
    • Ames Laboratory/Iowa State University
    • Ames Lab

  • Johnpierre Paglione

    • University of Maryland, College Park
    • Maryland Quantum Materials Center, Department of Physics, University of Maryland
    • Quantum Materials Center, Department of Physics, University of Maryland College Park
    • Quantum Materials Center, University of Maryland, College Park
    • Maryland Quantum Materials Center and Department of Physics, University of Maryland, College Park
    • University of Maryland