Skyrmion physics beyond the lowest Landau-level approximation

Article

关键词: QUANTUM HALL FERROMAGNETS;    MONTE-CARLO;    NU=1;    EXCITATIONS;    INTEGER;    LIQUID;    FIELD;    WELLS;    GAP;   

DOI  :  10.1103/PhysRevB.60.R8501

来源: SCIE

【 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.

【 授权许可】

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