期刊
PHYSICAL REVIEW B
卷 81, 期 24, 页码 -出版社
AMER PHYSICAL SOC
DOI: 10.1103/PhysRevB.81.245125
关键词
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资金
- MEXT, Japan [21244053, 17105002, 19048015, 19048008]
- Funding Program for World-Leading Innovative R&D on Science and Technology (FIRST Program)
- Ministry of Education of China [B06011]
- Grants-in-Aid for Scientific Research [21244053, 19048015, 19048008] Funding Source: KAKEN
We study theoretically the charged current above a topological insulator (TI) separated by a ferromagnetic insulating layer. An unconventional Hall response occurs in the conducting layer on top of the TI which approaches to a constant value independent of R for R << l and decays with proportional to R(-1) for R >> l, where R is the separation between TI and conducting layer and l is the screening length. In the comoving frame, it can be interpreted as a monopole current attached to the TI surface. The same mechanism gives the Hall response and deflection of the electron beam injected to the surface of insulating ferromagnet. A realistic estimate of an order of magnitude shows that both effects give reasonably large signal experimentally accessible.
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