Spin Polarization at Semiconductor Point Contacts in Absence of Magnetic Field(Condensed Matter: Electronic Structure, Electrical, Magnetic and Optical Properties)
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概要
- 論文の詳細を見る
Semiconductor point contacts can be a useful tool for producing spin-polarized currents in the presence of spin-orbit(SO) interaction. Neither magnetic fields nor magnetic materials are required. By numerical studies, we show that (i) the conductance is quantized in units of 2e^2/h unless the SO interaction is too strong, (ii) the current is spin-polarized in the transverse direction, and (iii) a spin polarization of more than 50% can be realized with experimentally accessible values of the SO interaction strength. The spinpolarization ratio is determined by the adiabaticity of the transition between subbands of different spins during the transport through the point contacts.
- 社団法人日本物理学会の論文
- 2005-07-15
著者
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Eto Mikio
Faculty Of Science And Technology Keio University
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Hayashi Tetsuya
Faculty Of Science And Technology Keio University
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KUROTANI Yuji
Faculty of Science and Technology, Keio University
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Kurotani Yuji
Faculty Of Science And Technology Keio University
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HAYASHI Tetsuya
Faculty of Science and Technology, Keio University
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ETO Mikio
Faculty of Science and Technology, Keio University
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