Topological winding properties of spin edge states in the Kane-Mele graphene model
Topological winding properties of spin edge states in the Kane-Mele graphene model
复制标题
Kane-Mele 石墨烯模型中自旋边缘态的拓扑缠绕特性
DOI:
10.1103/physrevb.80.115420
复制
发表时间:
2009-06
影响因子:
3.7
通讯作者:
Zhang, Ping
中科院分区:
文献类型:
--
作者:
Hao, Ningning;Wang, Zhigang;Zhang, Ping
We study the spin edge states in the quantum spin-Hall (QSH) effect on a single-atomic layer graphene-ribbon system with both intrinsic and Rashba spin-orbit couplings. The Harper equation for solving the energies of the spin edge states is derived. The results show that in the QSH phase, there are always two pairs of gapless spin-filtered edge states in the bulk energy gap, corresponding to two pairs of zero points of the Bloch function on the complex-energy Riemann surface (RS). The topological aspect of the QSH phase can be distinguished by the difference of the winding numbers of the spin edge states with different polarized directions cross the holes of the RS, which is equivalent to the Z(2) topological invariance proposed by Kane and Mele [Phys. Rev. Lett. 95, 146802 (2005)].
DOI:
10.1142/s0217979297001623
发表时间:
1998-03
期刊:
--
影响因子:
--
作者:
D. Thouless
通讯作者:
D. Thouless
DOI:
--
发表时间:
1976
期刊:
--
影响因子:
--
作者:
L. J. Boya;J. Mateos;J. Cariñena
通讯作者:
L. J. Boya;J. Mateos;J. Cariñena