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Optical Thermal Diffusivity Measurements in PdxErTe3

ORAL

Abstract

PdxErTe3 is a quasi-2D metal with two stripe ordered charge density wave (CDW) orders with of Pd intercalated between the ErTe3 layers [1]. Increasing Pd intercalation increases disorder and suppresses the CDW transitions [1,2]. We use a photo-thermal microscope for high resolution thermal diffusivity and optical reflectivity measurements by measuring phase delay in local reflectivity. This is supplemented with resistivity and thermopower measurements. Our primary observation is a decrease of thermal diffusivity and the onset of anisotropy in all transport channels below the higher temperature CDW transition. We will further discuss the relation between thermal and charge transport, and the applicability of Wiedemann-Franz law through the two CDW transitions.


[1] J. A. W. Straquadine, et al., Phys. Rev. B 99, 235138 (2019).
[2] A.Fang, et al., arXiv:1901.03471 [cond-mat.str-el].

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Presenters

  • Erik Kountz

    Stanford Univ

Authors

  • Erik Kountz

    Stanford Univ

  • Joshua A Straquadine

    Stanford Univ, Geballe Laboratory for Advanced Materials, Department of Applied Physics, Stanford University, Department of Applied Physics, Stanford University

  • Jiecheng Zhang

    Stanford Univ

  • Aharon Kapitulnik

    Stanford Univ, Physics, Stanford University, Stanford University

  • Ian Fisher

    Stanford University, Stanford Univ, Department of Applied Physics and Geballe Laboratory for Advanced Materials, Stanford University, Geballe Laboratory for Advanced Materials & Dept. of Applied Physics, Stanford University, Geballe Laboratory for Advanced Materials, Department of Applied Physics, Stanford University, Geballe Laboratory for Advanced Materials, Stanford University, Department of Applied Physics, Stanford University