The Helical Liquid and the Edge of Quantum Spin Hall Systems
| dc.creator | Wu, Congjun | |
| dc.creator | Bernevig, B. Andrei | |
| dc.creator | Zhang, Shou-Cheng | |
| dc.date | 2005-08-10 | |
| dc.date | 2006-02-27 | |
| dc.date.accessioned | 2026-07-07T06:41:33Z | |
| dc.date.available | 2026-07-07T06:41:33Z | |
| dc.description | The edge states of the recently proposed quantum spin Hall systems constitute a new symmetry class of one-dimensional liquids dubbed the ``helical liquid'', where the spin orientation is determined by the direction of electron motion. We prove a no-go theorem which states that a helical liquid with an odd number of components cannot be constructed in a purely 1D lattice system. In a helical liquid with an odd number of components, a uniform gap in the ground state can appear when the time-reversal (TR) symmetry is spontaneously broken by interactions. On the other hand, a correlated two-particle backscattering term by an impurity can become relevant while keeping the TR invariance. The Kondo effect in such a liquid exhibits new features in the structure of the screening cloud. | |
| dc.description | 4 pages, accepted by Phys. Rev. Lett | |
| dc.identifier | https://arxiv.org/abs/cond-mat/0508273 | |
| dc.identifier | http://arxiv.org/abs/cond-mat/0508273 | |
| dc.identifier | Phys. Rev. Lett. 96, 106401 (2006) | |
| dc.identifier | doi:10.1103/PhysRevLett.96.106401 | |
| dc.identifier.uri | http://salesiana.dossiersoluciones.com/handle/123456789/101708 | |
| dc.subject | Other Condensed Matter | |
| dc.title | The Helical Liquid and the Edge of Quantum Spin Hall Systems | |
| dc.type | text |