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Spin-polarized electron tunneling through a quantum dot
Lu, Y; Sun, QF; Lin, TH; Lin, TH , Peking Univ, State Key Lab Mesoscop Phys, Beijing 100871, Peoples R China.
2000
发表期刊COMMUNICATIONS IN THEORETICAL PHYSICS
ISSN0253-6102
卷号34期号:4页码:583-592
摘要Nonequilibrium Green's function is used to study spin-polarized electron tunneling through a quantum dot connected to two ferromagnetic electrodes with different orientations via two insulating barriers (FM/I/QD/I/FM). Intra-level Coulomb interaction in the dot is considered. General formula of tunneling current which can be used for arbitrary angle between the two electrodes' magnetizations is derived for both the weak and strong intra-dot interactions. We find that the transport current can be divided into two parts: the current with the spin-flip and the current without the spin-flip, which critically depend on the linewidth function near the Fermi level of the ferromagnetic electrodes. If a magnetic field is applied in the quantum dot, different behaviors will be found for weak and strong interactions.
部门归属Peking Univ, State Key Lab Mesoscop Phys, Beijing 100871, Peoples R China; Peking Univ, Dept Phys, Beijing 100871, Peoples R China; Acad Sinica, Inst Theoret Phys, Beijing 100080, Peoples R China
关键词Time-dependent Transport Magnetoresistance Junctions Systems
学科领域Physics
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收录类别SCI
WOS记录号WOS:000166949900002
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文献类型期刊论文
条目标识符http://ir.itp.ac.cn/handle/311006/12847
专题理论物理所SCI论文
通讯作者Lin, TH , Peking Univ, State Key Lab Mesoscop Phys, Beijing 100871, Peoples R China.
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Lu, Y,Sun, QF,Lin, TH,et al. Spin-polarized electron tunneling through a quantum dot[J]. COMMUNICATIONS IN THEORETICAL PHYSICS,2000,34(4):583-592.
APA Lu, Y,Sun, QF,Lin, TH,&Lin, TH , Peking Univ, State Key Lab Mesoscop Phys, Beijing 100871, Peoples R China..(2000).Spin-polarized electron tunneling through a quantum dot.COMMUNICATIONS IN THEORETICAL PHYSICS,34(4),583-592.
MLA Lu, Y,et al."Spin-polarized electron tunneling through a quantum dot".COMMUNICATIONS IN THEORETICAL PHYSICS 34.4(2000):583-592.
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