Electrodynamics of coupled charge-density wave 2D electron gas systems

TL;DR

This paper investigates how inductive and Coulombic couplings in a 2D electron gas coupled with a 1D charge-density wave create an anisotropic quantum fluid with exponential screening of electric fields and currents, akin to superconductivity.

Contribution

It introduces a model describing the electrodynamics of coupled 2D electron gases and charge-density waves, revealing screening effects similar to superconductivity.

Findings

Exponential screening of Hall electric field, current, and CDW phase gradient.

Penetration depth comparable to London penetration depth.

Coupling induces anisotropic quantum fluid behavior.

Abstract

The combined inductive and coulombic coupling of an orbitally quantized two-dimensional electron gas to a one-dimensional charge-density wave (CDW) is shown to give rise to an anisotropic quantum fluid in which the Hall electric field, current and gradient of the CDW phase are all exponentially screened from within the bulk. The characteristic penetration depth is similar to the London penetration depth of relevance to superconductivity.