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Resistivity saturation in a weakly interacting two-dimensional Fermi liquid at intermediate temperatures

机译:中等温度下弱相互作用的二维费米液体中的电阻率饱和

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摘要

We report an unusual temperature dependence in the magnetoresistance of a weakly interacting high mobility 2D electron gas (2DEG) under a parallel magnetic field and in the current configuration I ⊥ B. While the linear temperature dependence below 10 K and the exponential temperature dependence above 40 K agree with the existing theory of electron-phonon scattering, a field-induced resistivity saturation behavior characterized by an almost complete suppression of the temperature dependence is observed from approximately 20 to 40 K, which is in sharp contrast to the phenomenology observed in the configuration I ‖ B. Possible origins of this intermediate temperature phenomenon are discussed.
机译:我们报告了在平行磁场和当前配置I⊥B下,弱相互作用的高迁移率二维电子气(2DEG)的磁阻具有不寻常的温度依赖性。线性温度依赖性低于10 K,指数温度依赖性高于40 K与现有的电子-声子散射理论相一致,在大约20至40 K的温度范围内观察到了场感应电阻率饱和行为,其特征在于几乎完全抑制了温度依赖性,这与在组态中观察到的现象学形成鲜明对比。 I‖B。讨论了这种中间温度现象的可能起因。

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  • 来源
    《Physical review》 |2012年第4期|p.041310.1-041310.4|共4页
  • 作者单位

    Department of Physics, McGill University, Montreal, Canada H3A 2T8;

    Department of Physics, McGill University, Montreal, Canada H3A 2T8;

    National High Magnetic Field Laboratory, Tallahassee, Florida 32310, USA;

    Department of Physics, McGill University, Montreal, Canada H3A 2T8;

    Department of Electrical Engineering, Princeton University, Princeton, New Jersey 08544, USA;

    Department of Electrical Engineering, Princeton University, Princeton, New Jersey 08544, USA;

    Condensed Matter Theory Center, Department of Physics, University of Maryland, College Park, Maryland 20742, USA;

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  • 原文格式 PDF
  • 正文语种 eng
  • 中图分类
  • 关键词

    magnetoresistance; colossal magnetoresistance;

    机译:磁阻巨大的磁阻;

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