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Effects of anisotropy and disorder on the conductivity of Weyl semimetals

机译：各向异性和无序度对Weyl半金属电导率的影响

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摘要

We study dc conductivity of a Weyl semimetal with uniaxial anisotropy (Fermi velocity ratio ξ = υ_⊥/υ_‖≠1) considering the scattering of charge carriers by a wide class of impurity potentials, both short- and long-range. We obtain the ratio of transverse and longitudinal (with respect to the anisotropy axis) conductivities as a function of both ξ and temperature. We find that the transverse and longitudinal conductivities exhibit different temperature dependence in the case of short-range disorder. For general long-range disorder, the temperature dependence (～ T~4) of the conductivity turns out to be insensitive of the anisotropy in the limits of strong (ξ (＞＞) and (＜＜) 1) and weak (ξ ≈ 1) anisotropy.
机译：我们研究了具有单轴各向异性（费米速度比ξ=υ_⊥/υ_‖≠1）的Weyl半金属的dc电导率，其中考虑了电荷载流子在短程和长程中都受到广泛的杂质势的散射的影响。我们获得了横向电导率和纵向电导率（相对于各向异性轴）之比，它是ξ和温度的函数。我们发现，在短程无序情况下，横向和纵向电导率表现出不同的温度依赖性。对于一般的远程失调，电导率的温度依赖性（〜T〜4）在强（ξ（＞＞）和（＜＜）1）和弱（ξ≈）的范围内对各向异性不敏感。 1）各向异性。

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  • 来源
    《Physical review》 |2015年第19期|195117.1-195117.15|共15页
  • 作者

    Ya. I. Rodionov; K. I. Kugel; Franco Nori;

  • 作者单位

    Institute for Theoretical and Applied Electrodynamics, Russian Academy of Sciences, Izhorskaya Street 13, Moscow 125412, Russia;

    Institute for Theoretical and Applied Electrodynamics, Russian Academy of Sciences, Izhorskaya Street 13, Moscow 125412, Russia Center for Emergent Matter Science, RIKEN, Saitama 351-0198, Japan;

    Center for Emergent Matter Science, RIKEN, Saitama 351-0198, Japan Department of Physics, University of Michigan, Ann Arbor, Michigan 48109-1040, USA;

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  • 正文语种 eng
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  • 关键词

    theory of electronic transport; scattering mechanisms; disordered solids; relaxation times and mean free paths;

    机译：电子运输理论;散射机制无序固体松弛时间和平均自由程;

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