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Title: Skyrmion physics beyond the lowest Landau-level approximation

Abstract

The effects of Landau-level mixing and finite thickness of the two-dimensional electron gas on the relative stability of Skyrmion and single spin-flip excitations at Landau-level filling factor {nu}=1 have been investigated. Landau-level mixing is studied by fixed-phase diffusion Monte Carlo, and finite thickness is included by modifying the effective Coulomb interaction. Both Landau-level mixing and finite thickness lower Skyrmion excitation energies and favor Skyrmions with fewer spin flips. However, the two effects do not work {open_quotes}coherently.{close_quotes} When finite thickness is included, the effect of Landau-level mixing is strongly suppressed. {copyright} {ital 1999} {ital The American Physical Society}

Authors:
 [1];  [2];  [3]
  1. Department of Physics, University of Rhode Island, Kingston, Rhode Island 02881 (United States)
  2. National High Magnetic Field Laboratory and Department of Physics, Florida State University, Tallahassee, Florida 32310 (United States)
  3. Theoretical Division, Los Alamos National Laboratory, P.O. Box 1663, Los Alamos, New Mexico 87545 (United States)
Publication Date:
OSTI Identifier:
686559
Resource Type:
Journal Article
Journal Name:
Physical Review, B: Condensed Matter
Additional Journal Information:
Journal Volume: 60; Journal Issue: 12; Other Information: PBD: Sep 1999
Country of Publication:
United States
Language:
English
Subject:
66 PHYSICS; SKYRME POTENTIAL; SOLITONS; ELECTRON GAS; ZEEMAN EFFECT; ENERGY GAP; SPIN FLIP; MONTE CARLO METHOD; HALL EFFECT

Citation Formats

Melik-Alaverdian, V., Bonesteel, N.E., and Ortiz, G. Skyrmion physics beyond the lowest Landau-level approximation. United States: N. p., 1999. Web. doi:10.1103/PhysRevB.60.R8501.
Melik-Alaverdian, V., Bonesteel, N.E., & Ortiz, G. Skyrmion physics beyond the lowest Landau-level approximation. United States. doi:10.1103/PhysRevB.60.R8501.
Melik-Alaverdian, V., Bonesteel, N.E., and Ortiz, G. Wed . "Skyrmion physics beyond the lowest Landau-level approximation". United States. doi:10.1103/PhysRevB.60.R8501.
@article{osti_686559,
title = {Skyrmion physics beyond the lowest Landau-level approximation},
author = {Melik-Alaverdian, V. and Bonesteel, N.E. and Ortiz, G.},
abstractNote = {The effects of Landau-level mixing and finite thickness of the two-dimensional electron gas on the relative stability of Skyrmion and single spin-flip excitations at Landau-level filling factor {nu}=1 have been investigated. Landau-level mixing is studied by fixed-phase diffusion Monte Carlo, and finite thickness is included by modifying the effective Coulomb interaction. Both Landau-level mixing and finite thickness lower Skyrmion excitation energies and favor Skyrmions with fewer spin flips. However, the two effects do not work {open_quotes}coherently.{close_quotes} When finite thickness is included, the effect of Landau-level mixing is strongly suppressed. {copyright} {ital 1999} {ital The American Physical Society}},
doi = {10.1103/PhysRevB.60.R8501},
journal = {Physical Review, B: Condensed Matter},
number = 12,
volume = 60,
place = {United States},
year = {1999},
month = {9}
}