Magnetic field-induced giant enhancement of electron-phonon energy transfer in strongly disordered conductors

Abstract

Relaxation of soft modes (e.g. charge density in gated semiconductor heterostructures, spin density in the presence of magnetic field) slowed down by disorder may lead to giant enhancement of energy transfer (cooling power) between overheated electrons and phonons at low bath temperature. We show that in strongly disordered systems with time-reversal symmetry broken by external or intrinsic exchange magnetic field the cooling power can be greatly enhanced. The enhancement factor as large as $10^2$ at magnetic field $B\sim 10$ Tesla in 2D {\rm InSb} films is predicted. A similar enhancement is found for the ultrasound attenuation.

5 pages, 2 figures + Supplementary material (11 pages, 5 figures); considerable changes in the paper's structure as compared to the previous version

References in corpus (4)

• Deformation Electron-Phonon Coupling in Disordered Semiconductors and Nanostructures
• Intervalley-Scattering Induced Electron-Phonon Energy Relaxation in Many-Valley Semiconductors at Low Temperatures
• Electron kinetics in isolated mesoscopic rings driven out of equilibrium
• Electron-Acoustic Phonon Energy Loss Rate in Multi-Component Electron Systems with Symmetric and Asymmetric Coupling Constants

Cited by in corpus (7)

• Evidence for a Finite Temperature Insulator
• Electron cooling by phonons in superconducting proximity structures
• Ultrasonic attenuation in a pseudogapped superconductor
• Electron-phonon cooling power in Anderson insulators
• Ultrasonic attenuation via energy diffusion channel in disordered conductors
• Electron-phonon relaxation in a model of a granular film
• Local bistability under microwave heating for spatially mapping disordered superconductors