344 citations · 6.3k across the 155 of their papers we have counts for
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Topological insulator: a new quantized spin Hall resistance robust to dephasing
Hua Jiang, Shuguang Cheng, Qing-feng Sun +1
The influence of dephasing on the quantum spin Hall effect (QSHE) is studied. In the absence of dephasing, the longitudinal resistance in a QSHE system exhibits the quantum plateau…
Spin Bias Measurement Based on a Quantum Point Contact
Yanxia Xing, Qing-feng Sun, Jian Wang
Electron charge transport through a quantum point contact (QPC) driven by an asymmetric spin bias is studied. A large charge current is induced when the transmission coefficient of…
Spin Nernst effect and Nernst effect in two-dimensional electron systems
Shu-guang Cheng, Yanxia Xing, Qing-feng Sun +1
We study the Nernst effect and the spin Nernst effect, that a longitudinal thermal gradient induces a transverse voltage and a spin current. A mesoscopic four-terminal cross-bar de…
Josephson current transport through a Quantum Dot in an Aharonov-Bohm Ring
Shu-guang Cheng, Yanxia Xing, X. C. Xie +1
The Josephson current through an Aharonov-Bohm (AB) interferometer, in which a quantum dot (QD) is situated on one arm and a magnetic flux threads through the ring, has been in…
Disorder-induced enhancement of transport through graphene p-n junctions
Wen Long, Qing-feng Sun, Jian Wang
We investigate the electron transport through a graphene p-n junction under a perpendicular magnetic field. By using Landauar-Buttiker formalism combining with the non-equilibrium…
Conductance plateau in quantum spin transport through an interacting quantum dot
Yun-Juan Bao, Ning-Hua Tong, Qing-Feng Sun +1
Quantum spin transport is studied in an interacting quantum dot. It is found that a conductance "plateau" emerges in the non-linear charge conductance by a spin bias in the Kondo r…
Persistent spin current in nano-devices and definition of the spin current
Qing-feng Sun, X. C. Xie, Jian Wang
We investigate two closely related subjects: (i) existence of a pure persistent spin current in semiconducting mesoscopic device with a spin-orbit interaction's (SOI), and (ii) the…
Influence of dephasing process on the quantum Hall effect and the spin Hall effect
Yanxia Xing, Qing-feng Sun, Jian Wang
We study the influence of the phase relaxation process on Hall resistance and spin Hall current of a mesoscopic two-dimensional (2D) four-terminal Hall cross-bar with or without Ra…