Spectroscopy of soft modes and quantum phase transitions in coupled electron bilayers

TL;DR

This paper investigates how resonant inelastic light scattering detects soft collective modes in coupled electron bilayers, revealing their evolution across quantum phase transitions driven by temperature and magnetic field.

Contribution

It demonstrates the use of light scattering to probe soft modes and quantum phase transitions in strongly-correlated electron bilayers, providing new insights into their collective excitations.

Findings

Detection of soft collective modes via light scattering.

Observation of mode evolution with temperature and magnetic field.

Insights into quantum phase transitions in electron bilayers.

Abstract

Strongly-correlated two-dimensional electrons in coupled semiconductor bilayers display remarkable broken symmetry many-body states under accessible and controllable experimental conditions. In the cases of continuous quantum phase transitions soft collective modes drive the transformations that link distinct ground states of the electron double layers. In this paper we consider results showing that resonant inelastic light scattering methods detect soft collective modes of the double layers and probe their evolution with temperature and magnetic field. The light scattering experiments offer venues of research of fundamental interactions and continuous quantum phase transitions in low-dimensional electron liquids.