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- W1598282812 abstract "Publisher Summary This chapter discusses the general question of self-consistency in the calculation of the spin-transfer torque. The chapter also discusses the evaluation of the spin current from one-electron wave functions. A general method that links the current obtained from the spin current operator to an applied bias is required. In the analogous problem of charge transport, such a method has been developed by Landauer. He had shown that the conductance of a system sandwiched between two reservoirs could be given by its total quantum mechanical transmission coefficient. The Landauer formula for ordinary charge current gave the conductance of the whole system. This is all that is needed since the charge current is conserved and, therefore, can be calculated anywhere in the structure. In the case of a magnetic layer structure, the spin current was not conserved because it may get partially or even fully absorbed by the magnetic layers. The generalization of the Landauer formula to such a situation is described in the chapter. When such a generalized Landauer formula is applied to a simple parabolic band model, it gives results for local spin currents that are in complete agreement with the results obtained from the rigorous Keldysh formalism." @default.
- W1598282812 created "2016-06-24" @default.
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- W1598282812 date "2006-01-01" @default.
- W1598282812 modified "2023-09-25" @default.
- W1598282812 title "Chapter 8 Current-induced switching of magnetization" @default.
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- W1598282812 doi "https://doi.org/10.1016/s1572-0934(05)01008-5" @default.
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