Quantum Hall stripes in tilted magnetic fields in high-density GaAs quantum wells*

Quantum Hall stripe phases in GaAs quantum wells are usually aligned along [110] crystal axis but can exhibit unconventional orientation (along [1-10] direction) when the electron density is sufficiently high. It was recently demonstrated for stripe phases with conventional orientation that the number of in-plane magnetic field-induced reorientations depends sensitively on the carrier density. In particular, it was shown that the in-plane magnetic field does not reorient stripes when the density exceeds a certain value. Here, we investigate the effect of the in-plane magnetic field on stripe phases in high-density GaAs quantum wells. We find that the native stripes are still aligned along [110] and usually prefer to align perpendicular to the in-plane magnetic field.