Breakdown of the $v=1$ integer quantum Hall effect in the single particle and collective localization regimes
Journal Article
·
· Solid State Communications
- Purdue Univ., West Lafayette, IN (United States); OSTI
- Purdue Univ., West Lafayette, IN (United States)
- Princeton Univ., NJ (United States)
We report large signal current–voltage characteristics measurements near the $v=1$ integer quantum Hall plateau in a high mobility GaAs/AlGaAs sample that exhibits both single particle and collective localization. According to prior results, the central part of the $v=1$ plateau corresponds to single particle localization and hence an Anderson insulator. In contrast, the two regions in the flanks of this Anderson insulator were associated with collective localization and were identified with the integer quantum Hall Wigner solid. We find that, at low temperatures and under large bias currents, both the Anderson insulator and integer quantum Hall Wigner solid have a sharp onset of conduction above a threshold. Furthermore, this threshold shows an approximately monotonic dependence on the filling factor across the boundary between the two localized phases. Finally, to our surprise, we find that these large signal characteristics do not clearly distinguish between the Anderson insulator and the integer quantum Hall Wigner solid.
- Research Organization:
- Purdue Univ., West Lafayette, IN (United States)
- Sponsoring Organization:
- Gordon and Betty Moore Foundation; National Science Foundation (NSF); USDOE Office of Science (SC), Basic Energy Sciences (BES)
- Grant/Contract Number:
- SC0006671
- OSTI ID:
- 1977672
- Alternate ID(s):
- OSTI ID: 1960930
- Journal Information:
- Solid State Communications, Journal Name: Solid State Communications Journal Issue: C Vol. 353; ISSN 0038-1098
- Publisher:
- ElsevierCopyright Statement
- Country of Publication:
- United States
- Language:
- English
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