Sun, QF (reprint author), Chinese Acad Sci, Inst Phys, Beijing 100190, Peoples R China.
部门归属:
[Sun, Qing-feng; Xie, X. C.] Chinese Acad Sci, Inst Phys, Beijing 100190, Peoples R China; [Jiang, Zhao-tan] Beijing Inst Technol, Dept Phys, Beijing 100081, Peoples R China; [Yu, Yue] Chinese Acad Sci, Inst Theoret Phys, Beijing 100190, Peoples R China; [Xie, X. C.] Peking Univ, Int Ctr Quantum Mat, Beijing 100871, Peoples R China
英文摘要:
We show a spin superconductor in ferromagnetic graphene as the counterpart to the charge superconductor in which a spin-polarized electron-hole pair plays the role of the spin 2((h) over bar /2) "Cooper pair" with a neutral charge. We present a BCS-type theory for the spin superconductor. With the "London-type equations" of the super-spin-current density, we show the existence of an electric "Meissner effect" against a spatial varying electric field. We further study a spin superconductor/normal conductor/spin superconductor junction and predict a spin-current Josephson effect.
