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Topological defects and Goldstone excitations in domain walls between ferromagnetic quantum Hall effect liquids | | Vladimir I. Fal’ko
; S.V. Iordanskii
; | | Date: |
7 Dec 1998 | | Journal: | PRL 82, 402 (1999) | | Subject: | Mesoscopic Systems and Quantum Hall Effect; Disordered Systems and Neural Networks | cond-mat.mes-hall cond-mat.dis-nn | | Affiliation: | Lancaster U), S.V. Iordanskii (Landau Institute | | Abstract: | It is shown that the low-energy spectrum of a ferromagnetic quantum Hall effect liquid in a system with a multi-domain structure generated by an inhomogeneous bare Zeeman splitting $epsilon_{Z}$ is formed by excitations localized at the walls between domains. For a step-like $epsilon_Z(r)$, the domain wall spectrum includes a spin-wave with a linear dispersion and a small gap due to spin-orbit coupling, and a low-energy topological defects. The latter are charged and may dominate in the transport under conditions that the percolation through the network of domain walls is provided. | | Source: | arXiv, cond-mat/9901053 | | Services: | Forum | Review | PDF | Favorites | |
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