| 講師 | Prof. Yong-Shi Wu |
| (Department of Physics, University of Utah (USA) and | |
| Institute for Solid State Physics, University of Tokyo ) | |
| 日時 | 2005年 7月 12日(火)  (注意!時間変更) |
| 場所 | 3号館 108 |
| 講師 | Prof. Yong-Shi Wu |
| (Department of Physics, University of Utah (USA) and | |
| Institute for Solid State Physics, University of Tokyo ) | |
| 日時 | 2005年 7月 12日(火) (注意!時間変更) |
| 場所 | 3号館 108 |
The study of spin transport properties of electrons in solid-state systems has recently attracted much attention from both experimentalists and theorists. The spin Hall effect refers to the phenomenon that an electric field induces a spin current in a transverse direction. In the present talk I report on recent progress in theoretical understanding of topological aspects of the spin Hall effect. In particular, in a recent collaborative work, we point out that though the spin current is more complicated than the charge current, the spin Hall conductance in certain two-dimensional tight binding models can take only quantized values, due to nontrivial topology in momentum space, simlar to the charge Hall conductance. Both analysis of the bulk state and that of edge states verify this topological quantization of the spin Hall conductance.
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連絡先:
加藤雄介 (46534)
福島孝治 (46513)