Pinning mode resonances of 2D electron stripe phases: Effect of in-plane magnetic field

TL;DR

This study investigates how an in-plane magnetic field influences the anisotropic pinning-mode resonances in the stripe phase of 2D electron systems, revealing stripe reorientation and increased resonance frequency due to disorder interactions.

Contribution

It demonstrates the effect of in-plane magnetic fields on stripe orientation and pinning interactions in 2D electron systems, highlighting the role of disorder.

Findings

Resonance polarization switches with in-plane magnetic field.

Resonance frequency increases as in-plane magnetic field is applied.

Disorder interactions significantly influence stripe orientation.

Abstract

We study the anisotropic pinning-mode resonances in the rf conductivity spectra of the stripe phase of 2D electron systems (2DES) around Landau level filling 9/2, in the presence of an in-plane magnetic field, B_ip. The polarization along which the resonance is observed switches as B_ip is applied, consistent with the reorientation of the stripes. The resonance frequency, a measure of the pinning interaction between the 2DES and disorder, increases with B_ip. The magnitude of this increase indicates that disorder interaction is playing an important role in determining the stripe orientation.