Spins, charges, and currents at domain walls in a quantum Hall Ising ferromagnet

Article

关键词: RESISTANCE SPIKES;    MAGNETIC-FIELD;    EFFECT REGIME;    STATES;    POLARIZATION;    INSTABILITY;    TRANSITIONS;    EXCITATIONS;    SYSTEM;    NU=2/3;   

DOI  :  10.1103/PhysRevB.66.041308

来源: SCIE

【 摘 要 】

We study spin textures in a quantum Hall Ising ferromagnet. Domain walls between ferromagnetic and unpolarized states at nu=2 are analyzed with a functional theory supported by a microscopic calculation. In a neutral wall, Hartree repulsion prevents the appearance of a fan phase provoked by a negative stiffness. For a charged system, electrons become trapped as solitons at the domain wall. The size and energy of the solitons are determined by both Hartree and spin-orbit interactions. Finally, we discuss how electrical transport takes place through the domain wall.

【 授权许可】

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