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7 papers · 2 filters
Spin-orbit gap of graphene: First-principles calculations
Yugui Yao, Fei Ye, Xiao-Liang Qi +2
Even though graphene is a low energy system consisting of the two dimensional honeycomb lattice of carbon atoms, its quasi-particle excitations are fully described by the 2+1 dimen…
Transport through the intertube link between two parallel carbon nanotubes
Jia-Lin Zhu, Fu-fang Xu, Yu-feng Jia
Quantum transport through the junction between two metallic carbon nanotubes connected by intertube links has been studied within the TB method and Landauer formula. It is found th…
Aharonov-Bohm phase operations on a double-barrier nanoring charge qubit
Yuquan Wang, Ning Yang, Jia-Lin Zhu
We present a scheme for charge qubit implementation in a double-barrier nanoring. The logical states of the qubit are encoded in the spatial wavefunctions of the two lowest energy…
A General Theorem Relating the Bulk Topological Number to Edge States in Two-dimensional Insulators
Xiao-Liang Qi, Yong-Shi Wu, Shou-Cheng Zhang
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 topol…
Spin entanglement induced by spin-orbit interactions in coupled quantum dots
Nan Zhao, L. Zhong, Jia-Lin Zhu +1
We theoretically explore the possibility of creating spin quantum entanglement in a system of two electrons confined respectively in two vertically coupled quantum dots in the pres…
Quantum Spin Hall Effect and Topologically Invariant Chern Numbers
D. N. Sheng, Z. Y. Weng, L. Sheng +1
We present a topological description of quantum spin Hall effect (QSHE) in a two-dimensional electron system on honeycomb lattice with both intrinsic and Rashba spin-orbit coupling…