Topological-Fermi-liquid to quantum-Hall-liquid transitions: p -band and d -band fermions in an external magnetic field
Abstract
We find that in a multiorbital system, the Hall conductance may exhibit anomalous topological quantum phase transitions induced by on-site orbital polarization: both integer quantum-Hall (IQH) plateau transitions and topological-Fermi-liquid (TFL) to IQH transitions. The unusual TFL-to-IQH transitions are peculiar manifestations of orbital degeneracy and spatial anisotropy, and are demonstrated explicitly in a p -band spinless fermionic system and a d -band spinful fermionic system.
- Publication:
-
Physical Review B
- Pub Date:
- September 2010
- DOI:
- 10.1103/PhysRevB.82.113304
- arXiv:
- arXiv:0911.2758
- Bibcode:
- 2010PhRvB..82k3304W
- Keywords:
-
- 73.43.Nq;
- 03.75.Ss;
- 72.80.Ga;
- 73.43.Cd;
- Quantum phase transitions;
- Degenerate Fermi gases;
- Transition-metal compounds;
- Theory and modeling;
- Condensed Matter - Mesoscale and Nanoscale Physics;
- Condensed Matter - Quantum Gases
- E-Print:
- 4 pages, 4 figures