Da-Kun Wang, Qing-feng Sun and Hong Guo.Spin-battery and spin-current transport through a quantum dot.Phys. Rev. B,69,205312,2004 Yu Zhu, Tsung-han Lin and Qing-feng Sun.Writing spin in a quantum dot with ferromagnetic and superconducting electrodes.Phys. Rev. B,69,121302(R),2004 Qing-feng Sun, Hong Guo and Jian Wang.Spin-current-induced electric field.Phys. Rev. B,69,054409,2004 Yu Zhu, Wei Li, Zhong-shui Ma, Tsung-han Lin and Qing-feng Sun.ac Josephson effect in resonant tunneling through mesoscopic superconducting junctions.Phys. Rev. B,69,024518,2004 A.D. Guclu, Qing Feng Sun and Hong Guo.Kondo resonance in a quantum dot molecule.Phys. Rev. B,68,245323,2003 Wei Zheng, Junling Wu, Baigeng Wang, Jian Wang, Qingfeng Sun and Hong Guo.Parametric quantum spin pump.Phys. Rev. B,68,113306,2003 Qing-feng Sun, Hong Guo and Jian Wang.Correlated two-electron transport: A principle for a charge pump.Phys. Rev. B,68,035318,2003 Qing-feng Sun, Hong Guo and Jian Wang.A Spin Cell for Spin Current.Phys. Rev. Lett.,90,258301,2003 A. D. Guclu, Qing Feng Sun, Hong Guo and R. Harris.Geometric blockade in a quantum dot: Transport properties by exact diagonalization.Phys. Rev. B,66,195327,2002 Yu Zhu, Wei Li, Tsung-han Lin and Qing-feng Sun.Microwave-induced pi-junction transition in a superconductor/quantum dot/superconductor structure.Phys. Rev. B,66,134507,2002