Effect of density on quantum Hall stripe orientation in tilted magnetic fields

Abstract

We investigate quantum Hall stripes under in-plane magnetic field $B_{\parallel }$ in a variable-density two-dimensional electron gas. At filling factor $\nu =9/2$, we observe one, two, and zero $B_{\parallel }$-induced reorientations at low, intermediate, and high densities, respectively. The appearance of these distinct regimes is due to a strong density dependence of the $B_{\parallel }$-induced orienting mechanism which triggers the second reorientation, rendering stripes \emph{parallel} to $B_{\parallel }$. In contrast, the mechanism which reorients stripes perpendicular to $B_{\parallel }$ showed no noticeable dependence on density. Measurements at $\nu =9/2$ and $11/2$ at the same, tilted magnetic field, allows us to rule out density dependence of the native symmetry-breaking field as a dominant factor. Our findings further suggest that screening might play an important role in determining stripe orientation, providing guidance in developing theories aimed at identifying and describing native and $B_{\parallel }$-induced symmetry-breaking fields.

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• Orientation of hole quantum Hall nematic phases in an out-of-plane electric field
• Anomalous nematic-to-stripe phase transition driven by in-plane magnetic fields
• Quantum Hall stripes in high-density GaAs/AlGaAs quantum wells
• Effect of density on microwave-induced resistance oscillations in back-gated GaAs quantum wells
• Cavity QED Control of Quantum Hall Stripes
• Electronic band structure in $n$-type GaAs/AlGaAs wide quantum wells in tilted magnetic field