Theory of the Quantum Hall Insulator
Abstrak
The quantum Hall transition is one of the simplest and most studied quantum phase transitions. Nevertheless, the experimental observation of a new phase in this regime, the quantum Hall insulator, still remains a puzzle since the first report more than a decade ago, as it is in contradiction with all theoretical studies based on microscopically coherent quantum calculations. In this work we introduce into the coherent quantum theory a new ingredient - rare incoherent events, in a controlled manner. Using both direct numerical solutions and real-space renormalization, we demonstrate that these decoherence events stabilize the elusive quantum Hall insulator phase, which becomes even more stable with increasing temperature and voltage bias, in agreement with experiments.
Topik & Kata Kunci
Penulis (2)
Roi Levy
Yigal Meir
Akses Cepat
- Tahun Terbit
- 2010
- Bahasa
- en
- Sumber Database
- arXiv
- Akses
- Open Access ✓