Novel Radiation-induced Magnetoresistance Oscillations in a Nondegenerate 2DES on Liquid Helium

TL;DR

This paper reports the discovery of new magnetoresistance oscillations in a nondegenerate 2D electron system on liquid helium, caused by resonant inter-subband absorption and influenced by electron interactions and Landau level broadening.

Contribution

It presents the first observation of these novel oscillations and analyzes their dependence on scattering and many-electron effects.

Findings

Oscillations are periodic in 1/B.

Oscillations originate from scattering-mediated inter-subband transitions.

Structure affected by Landau level broadening and electron interactions.

Abstract

We report the observation of novel magnetoresistance oscillations induced by the resonant inter-subband absorption in nondegenerate 2D electrons bound to the surface of liquid helium. The oscillations are periodic in 1/B and originate from the scattering-mediated transitions of the excited electrons into the Landau states of the first subband. The structure of the oscillations is affected by the collision broadening of the Landau levels and by many-electron effects.