Electron-phonon decoupling in two dimensions

George McArdle, Igor V. Lerner

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Abstract

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.

Original languageEnglish
Article number24293
JournalScientific Reports
Volume11
Issue number1
DOIs
Publication statusPublished - 21 Dec 2021

Bibliographical note

Funding Information:
We gratefully acknowledge support from EPSRC under the grant EP/R029075/1. We thank V. I. Yudson for useful comments.

ASJC Scopus subject areas

  • General

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