Spins, charges, and currents at domain walls in a quantum Hall Ising ferromagnet - art. no. 041308

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. [References: 29]