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Hot electron effects and electric field scaling near the metal-insulator transition in multilayer MoS_2

机译：多层MoS_2中金属-绝缘体转变附近的热电子效应和电场缩放

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摘要

The layered transition metal dichalcogenides have emerged as valuable platforms to study the challenging problem of metal-insulator transition in two dimensions. It was demonstrated that multilayer MoS_2 exhibits clearly distinctive metallic and insulating behaviors in conductivity in response to both temperature and the electric field. Here, we report on the scaling analyses of conductivity for the electric field in addition to the temperature, which is performed with the consideration of electron-electron interactions for multilayer MoS_2. Based on the analysis of hot electron effects in the electric field, we find that scaling for the electric field is relevant for the metallic phase in the high-field regime, enabling one to extract the dynamical critical exponent z close to 1. This result supports that the metal-insulator transition in multilayer MoS_2 is a true quantum critical phenomenon, in which strong interactions induce the transition.
机译：层状过渡金属二卤化物已成为研究二维二维金属-绝缘体过渡难题的重要平台。结果表明，多层MoS_2响应于温度和电场，在导电性方面表现出明显不同的金属和绝缘行为。在这里，我们报告了除温度以外的电场电导率的比例分析，该分析是考虑多层MoS_2的电子-电子相互作用而进行的。根据对电场中热电子效应的分析，我们发现电场的标度与高场态下的金属相有关，从而使人们能够提取接近1的动态临界指数z。多层MoS_2中的金属-绝缘体跃迁是真正的量子临界现象，其中强相互作用诱导了跃迁。

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  • 来源
    《Physical review》 |2020年第3期|035421.1-035421.5|共5页
  • 作者

    Byoung Hee Moon; Gang Hee Han; Young Hee Lee;

  • 作者单位

    Center for Integrated Nanostructure Physics Institute for Basic Science (IBS) Suwon 16419 Republic of Korea Department of Energy Science Sungkyunkwan University Suwon 16419 Republic of Korea;

    Center for Integrated Nanostructure Physics Institute for Basic Science (IBS) Suwon 16419 Republic of Korea Department of Physics Incheon National University Incheon 22012 Republic of Korea;

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