Correlated wavefunction Monte Carlo studies of excitations in the quantum Hall liquids
- 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; TRN: 94:022836
- Resource Relation:
- Conference: 22. international conference on physics of semiconductors,Vancouver (Canada),15-19 Aug 1994; Other Information: PBD: Aug 1994
- Country of Publication:
- United States
- Language:
- English
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