Orientation of hole quantum Hall nematic phases in an out-of-plane electric field

14 May 2019 Croxall A. F. Sfigakis F. Waldie J. Farrer I. Ritchie D. A.

We present observations of an anisotropic resistance state at Landau level filling factor $\nu=5/2$ in a two-dimensional hole system (2DHS), which occurs for certain values of hole density $p$ and average out-of-plane electric field $E_\perp$. The 2DHS is induced by electric field effect in an undoped GaAs/AlGaAs quantum well, where front and back gates allow independent tuning of $p$ and $E_\perp$, and hence the symmetry of the confining potential... (read more)

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