Hartree-Fock theory of skyrmions in quantum Hall ferromagnets

Article

关键词: SPONTANEOUS INTERLAYER COHERENCE;    OPTICALLY PUMPED NMR;    EXCITATIONS;    SYSTEMS;    WELLS;   

DOI  :  10.1103/PhysRevB.55.10671

来源: SCIE

【 摘 要 】

We report on a study of the charged-Skymion or spin-texture excitations which occur in quantum Hall ferromagnets near odd Landau-level filling factors. Particle-hole symmetry is used to relate the spin-quantum numbers of charged particle and hole excitations and neutral particle-hole pair excitations. Hartree-Fock theory is used to provide quantitative estimates of the energies of these excitations and their dependence on Zeeman coupling strength, Landau-level quantum numbers, and the thicknesses of the two-dimensional electron layers. For the case of v near three we suggest the possibility of first-order phase transitions with increasing Zeeman coupling strength from a many-Skyrmion state to one with many maximally spin-polarized quasiparticles.

【 授权许可】

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