Scholarlink

<p>We report the observation of two distinct thresholds on voltage–current characteristics, accompanied by a peak in broadband current noise occurring between the two threshold voltages, in the insulating state of strongly interacting two-dimensional electron systems. The effects were observed in silicon metal-oxide–semiconductor field-effect transistors and ultra-high mobility SiGe/Si/SiGe heterostructures. A phenomenological theory of the collective depinning of elastic structures can explain the observed results. This provides evidence for the formation of an electron solid in these electron systems and demonstrates the generality of the effect in different classes of two-dimensional electron systems. Interestingly, the double-threshold voltage–current curves, indicative of electron solid formation at low densities, are not observed in the quantum Hall regime. This lack of observation does not confirm the existence of a quasiparticle quantum Hall Wigner solid and indicates that quasiparticles near integer filling do not form an independent subsystem.</p>

错误：搜索内容不能为空，请输入英文关键词
错误：关键词超出字数限制，请精简
高级检索

Collective Depinning and Sliding of a Two-Dimensional Quantum Electron Solid in Semiconductors (Brief Review)

  • 期刊论文

  • 出版模式：

    开放获取

  • 发表日期：

    2025年9月16日

查看全文
  • A. A. Shashkin,
  • S. V. Kravchenko

摘要

We report the observation of two distinct thresholds on voltage–current characteristics, accompanied by a peak in broadband current noise occurring between the two threshold voltages, in the insulating state of strongly interacting two-dimensional electron systems. The effects were observed in silicon metal-oxide–semiconductor field-effect transistors and ultra-high mobility SiGe/Si/SiGe heterostructures. A phenomenological theory of the collective depinning of elastic structures can explain the observed results. This provides evidence for the formation of an electron solid in these electron systems and demonstrates the generality of the effect in different classes of two-dimensional electron systems. Interestingly, the double-threshold voltage–current curves, indicative of electron solid formation at low densities, are not observed in the quantum Hall regime. This lack of observation does not confirm the existence of a quasiparticle quantum Hall Wigner solid and indicates that quasiparticles near integer filling do not form an independent subsystem.