# Negative electronic compressibility enables electrically-induced charge density waves in a two-dimensional electron liquid

## TL;DR

This paper demonstrates that negative electronic compressibility in 2D electron systems allows for electrically-induced, tunable charge density waves without current flow, controlled by screening length and force magnitude.

## Contribution

It introduces a novel mechanism for generating charge density waves in 2D electron liquids via negative compressibility and uniform force fields.

## Key findings

- Charge density waves can be generated without current flow.
- Wave properties are tunable by electrical parameters.
- Negative compressibility enables new electronic phase control.

## Abstract

We show that the negative electronic compressibility of two-dimensional electronic systems at sufficiently low density enables the generation of charge density waves through the application of a uniform force field, provided no current is allowed to flow. The wavelength of the density oscillations is controlled by the magnitude of the (negative) screening length, and their amplitude is proportional to the applied force. Both are electrically tunable.