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

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

Shi, Q. (TU Delft Integral Design & Management; University of Minnesota Twin Cities)
Zudov, M. A. (University of Minnesota Twin Cities)
Qian, Q. (Purdue University)
Watson, J.D. (TU Delft QRD/Kouwenhoven Lab; Purdue University)
Manfra, M. J. (Purdue University)

2017

We investigate quantum Hall stripes under an in-plane magnetic field B in a variable-density two-dimensional electron gas. At filling factor ν=9/2, we observe one, two, and zero Binduced reorientations at low, intermediate, and high densities, respectively. The appearance of these distinct regimes is due to a strong density dependence of the Binduced orienting mechanism which triggers the second reorientation, rendering stripes parallel to B. In contrast, the mechanism which reorients stripes perpendicular to B showed no noticeable dependence on density. Measurements at ν=9/2 and 11/2 at the same, tilted magnetic field allow us to rule out the 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 induced symmetry-breaking fields.

http://resolver.tudelft.nl/uuid:498c34b0-ab9a-4ae2-83bc-d9a81b09f915

https://doi.org/10.1103/PhysRevB.95.161303

2469-9950

Physical Review B, 95 (16)

Institutional Repository

journal article

© 2017 Q. Shi, M. A. Zudov, Q. Qian, J.D. Watson, M. J. Manfra