Modulated helical metals at magnetic domain walls of pyrochlore iridium oxides

Article

关键词: TOPOLOGICAL-INSULATOR;    SPIN;    CYCLOTRON;    RESONANCE;    CRYSTAL;   

DOI  :  10.1103/PhysRevB.93.195146

来源: SCIE

【 摘 要 】

Spontaneous symmetry breakings, metal-insulator transitions, and transport properties of magnetic-domain-wall states in pyrochlore iridium oxides are studied by employing a symmetry-adapted effective Hamiltonian with a slab perpendicular to the (111) direction of the pyrochlore structure. Emergent metallic domain wall, which has an unconventional topological nature with a controllable and mobile metallic layer, is shown to host Fermi surfaces with modulated helical spin textures resembling Rashba metals. The helical nature of the domain-wall Fermi surfaces is experimentally detectable by anomalous Hall conductivity, circular dichroism, and optical Hall conductivity under external magnetic fields. Possible applications of the domain-wall metals to spin-current generation and half-metallic conduction are also discussed.

【 授权许可】

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