Mean-Field Calculations of Transport Properties through Magnetic Point Contacts
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概要
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Electric transport through atomic-size point contacts of magnetic metals is theoretically studied. The conductance in spin-polarized states is examined, using a Green's function method to take into account the electron-electron interaction. In a single s-band model, the conductance quantization is observed in units of e^2/h per spin direction. In a two-band model (broad s and narrow s bands), the conductance is considerably suppressed by the interband scattering around the point contact when the spin is polarized in one direction in the whole system. When the spin polarization on one side of the contact is anti-parallel to that on the other side, the interband scattering is not relevant and the conductance is quantized. These calculated results are in accordance with experimental results for break-junctions of Ni.
- 社団法人日本物理学会の論文
- 2003-06-15
著者
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Eto Mikio
Faculty Of Science And Technology Keio University
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Ueno K
Faculty Of Science And Technology Keio University
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UENO Kyu
Faculty of Science and Technology, Keio University
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Ueno Kyu
Faculty Of Science And Technology Keio University
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