Current induced transition of anisotropic quantum Hall states

TL;DR

This paper investigates how injected currents influence the stability of anisotropic quantum Hall states, showing that a striped Hall state becomes energetically favorable over the ACDW state beyond a critical current of approximately 0.04-0.05 nA.

Contribution

It demonstrates the current-induced transition between anisotropic quantum Hall states, providing quantitative estimates of the critical current for the phase change.

Findings

Striped Hall state becomes lower in energy with current injection.

Critical current for transition is approximately 0.04-0.05 nA.

Energy comparison depends on injected current magnitude.

Abstract

We compare the energies of the striped Hall state and the anisotropic charge density wave (ACDW) state at half-filled third and higher Landau levels in the system with injected currents. With no injected current, the ACDW state has a lower energy. We find that the striped Hall state becomes the lower energy state when the injected current exceeds a critical value. The critical value is estimated as about 0.04-0.05 nA.