Quantum Hall effects in fast-rotating Fermi gases with anisotropic dipolar interaction

Journal Article · Wed Jun 15 00:00:00 EDT 2011 · Physical Review. A

DOI:https://doi.org/10.1103/PHYSREVA.83.063633· OSTI ID:21550178

Qiu, R -Z; Yi, S ^[1]; Kou, Su-Peng ^[2]; Hu, Z -X ^[3]; Xin, Wan ^[4]

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1. Key Laboratory of Frontiers in Theoretical Physics, Institute of Theoretical Physics, Chinese Academy of Sciences, Beijing 100190 (China)
2. Department of Physics, Beijing Normal University, Beijing 100875 (China)
3. Department of Electrical Engineering, Princeton University, Princeton, New Jersey 08544 (United States)
4. Zhejiang Institute of Modern Physics, Zhejiang University, Hangzhou 310027 (China)

We investigate fast rotating quasi-two-dimensional dipolar Fermi gases in the quantum Hall regime. By tuning the direction of the dipole moments with respect to the z axis, the dipole-dipole interaction becomes anisotropic in the x-y plane. For a soft confining potential we find that, as we tilt the angle of the dipole moments, the system evolves from a {nu}=1/3 Laughlin state with dipoles being polarized along the z axis to a series of ground states characterized by distinct mean total angular momentum, and finally to an anisotropic integer quantum Hall state. During the transition from the fractional regime to the integer regime, we find that the density profile of the system exhibits crystal-like structures. We map out the ground states as a function of the tilt angle and the confining potential, revealing the competition of the isotropic confining potential and both the isotropic and anisotropic components of the dipole-dipole interaction.

• OSTI ID: 21550178
• Journal Information: Physical Review. A, Vol. 83, Issue 6; Other Information: DOI: 10.1103/PhysRevA.83.063633; (c) 2011 American Institute of Physics; ISSN 1050-2947
• Country of Publication: United States
• Language: English

Related Subjects

75 CONDENSED MATTER PHYSICS
SUPERCONDUCTIVITY AND SUPERFLUIDITY
71 CLASSICAL AND QUANTUM MECHANICS
GENERAL PHYSICS
74 ATOMIC AND MOLECULAR PHYSICS
ANGULAR MOMENTUM
ANISOTROPY
CRYSTAL STRUCTURE
DENSITY
DIPOLE MOMENTS
DIPOLES
FERMI GAS
GROUND STATES
INTERACTIONS
POTENTIALS
SPACE DEPENDENCE
TUNING
TWO-DIMENSIONAL CALCULATIONS
ENERGY LEVELS
MULTIPOLES
PHYSICAL PROPERTIES