Correlated wavefunction Monte Carlo studies of excitations in the quantum Hall liquids

Conference · Mon Aug 01 04:00:00 EDT 1994

OSTI ID:10192504

Kralik, B; Rappe, A M; Louie, S G ^[1]

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1. Univ. of California, Berkeley, CA (United States). Dept. of Physics

Various excitations in the quantum Hall liquid at different Landau level filling factors are studied using a variational quantum Monte Carlo approach. Quantities calculated include spin-flip energies and dispersion relations for the collective modes (the magnetorotons and magnetoplasmons). The present approach goes beyond the lowest-Landau-level and single-mode approximations commonly used in previous studies. The inclusion of Landau-level mixing along with finite-thickness and donor effects satisfactorily explains values for the {nu} = 1 spin-flip energy that are found in recent photoluminescence experiments on {delta}-doped samples. In the case of the magnetorotons at {nu} = 1/3, the authors show that multiple-mode effects can change the excitation energies significantly, especially for high r{sub s} samples (by nearly 50% at r{sub s} = 20).

• Research Organization: Lawrence Berkeley Lab., CA (United States)
• Sponsoring Organization: USDOE, Washington, DC (United States); National Science Foundation, Washington, DC (United States)
• DOE Contract Number: AC03-76SF00098
• OSTI ID: 10192504
• Report Number(s): LBL--36063; CONF-9408155--10; ON: DE95002337; CNN: Grant DMR91-20269
• Country of Publication: United States
• Language: English

Related Subjects

665430
75 CONDENSED MATTER PHYSICS
SUPERCONDUCTIVITY AND SUPERFLUIDITY
CHARGE DENSITY
HALL EFFECT
KINETIC ENERGY
LANDAU FLUCTUATIONS
MONTE CARLO METHOD
OTHER TOPICS IN QUANTUM FLUIDS AND SOLIDS
PHOTOLUMINESCENCE
QUANTUM FLUIDS
WAVE FUNCTIONS