arXivDaily arXiv每日学术速递 周一至周五更新
北美退伍军人节(Veterans Day),12 日无更新
arXiv 2201.10882cond-mat.mes-hallcond-mat.dis-nncond-mat.str-el
收藏

二维电子-声子解耦

Electron-Phonon Decoupling in Two Dimensions

George McArdle, Igor V. Lerner

摘要:

为了观察电子系统中的多体局域化,需要与晶格声子解耦,这只有在非平衡系统中才有可能。我们表明,这样的电子-声子去耦可能会发生在悬浮膜,它体现了自己通过在电子温度的双稳态。通过研究电子-声子冷却率在无序,悬浮膜与二维声子,我们得到了这样的双稳态,这可以通过实验观察到的非线性电流-电压特性的几个数量级的滞后跳跃所需的条件。我们证明,这样的制度是可以实现的系统中的平衡电导率的阿克里乌斯形式,而实际上是不可达到的材料与莫特或Efros-Shklovskii跳跃。

英文摘要:

In order to observe many-body localisation in electronic systems, decoupling from the lattice phonons is required, which is possible only in out-of-equilibrium systems. We show that such an electron-phonon decoupling may happen in suspended films and it manifests itself via a bistability in the electron temperature. By studying the electron-phonon cooling rate in disordered, suspended films with two-dimensional phonons, we derive the conditions needed for such a bistability, which can be observed experimentally through hysteretic jumps of several orders of magnitude in the nonlinear current-voltage characteristics. We demonstrate that such a regime is achievable in systems with an Arrhenius form of the equilibrium conductivity, while practically unreachable in materials with Mott or Efros-Shklovskii hopping.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

↑