TO
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| Creator | Title | Description | Subject | Date | ||
|---|---|---|---|---|---|---|
| 1 |
 | Wu, Yong-Shi | General theorem relating the bulk topological number to edge states in two-dimensional insulators | We prove a general theorem on the relation between the bulk topological quantum number and the edge states in two-dimensional insulators. It is shown that whenever there is a topological order in bulk, characterized by a nonvanishing Chern number, even if it is defined for a nonconserved quantity s... | Edge states; Bulk topology; Chern number | 2006-07 |
| 2 |
 | Wu, Yong-Shi | Hidden massive Dirac fermions in effective field theory for integral quantum Hall transitions | Integral quantum Hall plateau transitions in a planar lattice system due to gap collapse can be described by an effective field theory with Dirac fermions. We discuss how to reproduce the correct integral values for the Hall conductance sxy before and after the plateau transition, which are dictat... | Dirac fermions; Vorticities; Edge states; Hall conductance | 1996-08 |
| 3 |
 | Wu, Yong-Shi | Topological quantization of the spin Hall effect in two-dimensional paramagnetic semiconductors | We propose models of two-dimensional paramagnetic semiconductors where the intrinsic spin Hall effect is exactly quantized in integer units of a topological charge. The model describes a topological insulator in the bulk and a "holographic metal" at the edge, where the number of extended edge stat... | Topological insulator; Holographic metal; Edge states | 2006-08 |
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