...
  • 主题
高级搜索  >
历史搜索 清空历史
首页> 外文期刊>Physical review >Two-component Coulomb glass in insulators with a local attraction
【24h】

Two-component Coulomb glass in insulators with a local attraction

机译：绝缘子中具有局部吸引力的两组分库仑玻璃

获取原文
获取原文并翻译 | 示例
           
页面导航
  • 摘要
  • 著录项
  • 相似文献
  • 相关主题

摘要

Motivated by evidence of local electron-electron attraction in experiments on disordered insulating films, we propose a two-component Coulomb glass model that combines strong disorder and long-range Coulomb repulsion with the additional possibility of local pockets of a short-range interelectron attraction. This model hosts a variety of interesting phenomena, in particular a crucial modification of the Coulomb gap previously believed to be universal. Tuning the short-range interaction to be repulsive, we find nonmonotonic humps in the density of states within the Coulomb gap. We further study variable-range hopping transport in such systems by extending the standard resistor network approach to include the motion of both single electrons and local pairs. In certain parameter regimes the competition between these two types of carriers results in a distinct peak in resistance as a function of the local attraction strength, which can be tuned by a magnetic field.
机译：基于无序绝缘膜上的局部电子吸引的证据，我们提出了一种由两部分组成的库仑玻璃模型，该模型将强无序性和长距离库仑排斥与短距离电子吸引的局部区域结合起来。该模型包含各种有趣的现象，特别是对先前被认为是普遍存在的库仑间隙的重要修正。将短程交互调整为排斥性，我们发现库仑带隙内的状态密度具有非单调峰。我们通过扩展标准电阻器网络方法以包括单个电子和局部对的运动，来进一步研究此类系统中的变程跳跃传输。在某些参数范围内，这两种类型的载流子之间的竞争会导致电阻的峰值随局部吸引力的变化而变化，该峰值可由磁场调节。

著录项

  • 来源
    《Physical review》 |2012年第19期|p.195141.1-195141.11|共11页
  • 作者

    Joe Mitchell; Anirban Gangopadhyay; Victor Galitski; Markus Miiller;

  • 作者单位

    Center for Nanophysics and Advanced Materials, Department of Physics, University of Maryland, College Park, Maryland 20742-4111, USA;

    Center for Nanophysics and Advanced Materials, Department of Physics, University of Maryland, College Park, Maryland 20742-4111, USA;

    Center for Nanophysics and Advanced Materials, Department of Physics, University of Maryland, College Park, Maryland 20742-4111, USA,Joint Quantum Institute, Department of Physics, University of Maryland, College Park, Maryland 20742-4111, USA,Kavli Institute for Theoretical Physics, University of California Santa Barbara, California 93106-4030, USA;

    Kavli Institute for Theoretical Physics, University of California Santa Barbara, California 93106-4030, USA,The Abdus Salam International Centre for Theoretical Physics, P. O. Box 586, 34151 Trieste, Italy;

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

    superconducting films and low-dimensional structures; disordered structures; amorphous and glassy solids; mobility edges; hopping transport; electronic transport phenomena in thin films;

    机译：超导膜和低维结构;无序的结构;无定形和玻璃状固体;流动性边缘;跳车运输;薄膜中的电子传输现象;

相似文献

  • 外文文献
  • 中文文献
  • 专利
获取原文

客服邮箱：kefu@zhangqiaokeyan.com

京公网安备：11010802029741号 ICP备案号：京ICP备15016152号-6 六维联合信息科技 (北京) 有限公司©版权所有

  • 客服微信

  • 服务号