Cheng, Shu-guang, Xing, Yanxia, Wang, Jian, Sun, Qing-feng
We report the investigation of electron transport through a four-terminal graphene-superconductor hybrid system. Due to the quantum interference of the reflected holes from two...
Qiao, Zhenhua, Xing, Yanxia, Wang, Jian
We report a theoretical investigation on conductance fluctuation of mesoscopic systems. Extensive numerical simulations on quasi-one dimensional, two dimensional, and quantum dot systems with...
Transient dynamics of molecular devices under step-like pulse bias (2009)
Wang, Bin, Xing, Yanxia, Zhang, Lei, Wang, Jian
We report first principles investigation of time-dependent current of molecular devices under a step-like pulse.Our results show that although the switch-on time of the molecular device is comparable...
Spin Bias Measurement Based on a Quantum Point Contact (2008)
Xing, Yanxia, Sun, Qing-feng, Wang, Jian
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 the QPC jumps from...
Double quantum dot as detector of spin bias (2008)
Sun, Qing-feng, Xing, Yanxia, Shen, Shun-Qing
It was proposed that a double quantum dot can be used to be a detector of spin bias. Electron transport through a double quantum dot is investigated theoretically when a pure spin bias is applied on...
Spin Nernst effect and Nernst effect in two-dimensional electron systems (2008)
Cheng, Shu-guang, Xing, Yanxia, Sun, Qing-feng, Xie, X. C.
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 device having the...
Influence of dephasing process on the quantum Hall effect and the spin Hall effect (2008)
Xing, Yanxia, Sun, Qing-feng, Wang, Jian
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 Rashba spin-orbit...
Josephson current transport through a Quantum Dot in an Aharonov-Bohm Ring (2008)
Cheng, Shu-guang, Xing, Yanxia, Xie, X. C., Sun, Qing-feng
The Josephson current through an Aharonov-Bohm (AB) interferometer, in which a quantum dot (QD) is situated on one arm and a magnetic flux $\Phi$ threads through the ring, has been investigated. With...
Symmetry and transport property of spin current induced spin-Hall effect (2007)
Xing, Yanxia, Sun, Qing-feng, Wang, Jian
We study the spin current induced spin-Hall effect that a longitudinal spin dependent chemical potential $qV_{s=x,y,z}$ induces a transverse spin conductances $G^{ss'}$. A four terminal system with...
Response time of a normal-superconductor hybrid system under the step-like pulse bias (2007)
Xing, Yanxia, Sun, Qing-feng, Wang, Jian
The response of a quantum dot coupled with one normal lead and a superconductor lead driven by a step-like pulse bias $V_L$ is studied using the non-equilibrium Green function method. In the linear...
Xing, Yanxia, Sun, Qing-feng, Wang, Jian
The spin Hall effect in a finite ballistic two-dimensional system with Rashba and Dresselhaus spin-orbit interaction is studied numerically. We find that the spin Hall conductance is very sensitive...
Opposite spin accumulations on the transverse edges by the confining potential (2006)
Xing, Yanxia, Sun, Qing-feng, Tang, Liang, Hu, JiangPing
We show that the spin-orbit interaction induced by the boundary confining potential causes opposite spin accumulations on the transverse edges in a zonal two-dimensional electron gas in the presence...