Skyrmion physics beyond the lowest Landau-level approximation

被引：19
|
作者：
Melik-Alaverdian, V [1 ]
Bonesteel, NE
Ortiz, G
机构：
[1] Univ Rhode Isl, Dept Phys, Kingston, RI 02881 USA
[2] Florida State Univ, Natl High Magnet Field Lab, Tallahassee, FL 32310 USA
[3] Florida State Univ, Dept Phys, Tallahassee, FL 32310 USA
[4] Univ Calif Los Alamos Natl Lab, Div Theoret, Los Alamos, NM 87545 USA
来源：
PHYSICAL REVIEW B | 1999年 / 60卷 / 12期
基金：
美国国家科学基金会;
关键词：
D O I：
10.1103/PhysRevB.60.R8501
中图分类号：
T [工业技术];
学科分类号：
08 ;
摘要：
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 = I 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 "coherently." When finite thickness is included, the effect of Landau-level mixing is strongly suppressed.
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页码：R8501 / R8504
页数：4
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