Electromodulation of the bilayer $\nu$=2 quantum Hall phase diagram

TL;DR

This paper predicts how applying an external bias voltage can reveal different magnetic phases and phase transitions in a bilayer quantum Hall system at filling factor 2, including a novel canted antiferromagnetic phase.

Contribution

It provides precise experimental predictions for observing magnetic phases and phase transitions, highlighting the role of bias voltage in accessing the canted antiferromagnetic phase.

Findings

Bias voltage enables observation of magnetic phases.

Prediction of the canted antiferromagnetic phase.

Analysis of phase transitions in bilayer quantum Hall systems.

Abstract

We make a number of precise experimental predictions for observing the various magnetic phases and the quantum phase transitions between them in the $\nu$=2 bilayer quantum Ha ll system. In particular, we analyze the effect of an external bias voltage on the quantum phase diagram, finding that a finite bias should readily enable the experimental observation of the recently predicted novel canted antiferromagnetic phase in transport and spin polarization measurements.