Orbital Analogue of the Quantum Anomalous Hall Effect in p-Band Systems

Journal Article · Fri Oct 31 00:00:00 EDT 2008 · Physical Review Letters

DOI:https://doi.org/10.1103/PHYSREVLETT.101.186807· OSTI ID:21179873

Congjun, Wu ^[1]

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1. Department of Physics, University of California, San Diego, California 92093 (United States)

We investigate the topological insulating states of the p-band systems in optical lattices induced by the on site orbital angular momentum polarization, which exhibit gapless edge modes in the absence of Landau levels. This effect arises from the energy-level splitting between the on site p{sub x}+ip{sub y} and p{sub x}-ip{sub y} orbitals by rotating each optical lattice site around its own center. At large rotation angular velocities, this model naturally reduces to two copies of Haldane's quantum Hall model. The distribution of the Berry curvature in momentum space and the quantized Chern numbers are calculated. The experimental realization of this state is feasible.

• OSTI ID: 21179873
• Journal Information: Physical Review Letters, Vol. 101, Issue 18; Other Information: DOI: 10.1103/PhysRevLett.101.186807; (c) 2008 The American Physical Society; Country of input: International Atomic Energy Agency (IAEA); ISSN 0031-9007
• Country of Publication: United States
• Language: English

Related Subjects

71 CLASSICAL AND QUANTUM MECHANICS
GENERAL PHYSICS
ANGULAR VELOCITY
ENERGY LEVELS
HALL EFFECT
ORBITAL ANGULAR MOMENTUM
POLARIZATION
QUANTUM MECHANICS
ROTATION
TOPOLOGY