Abstract
Spin-dependent ac transport problem is studied with exchange effects. Spin-spin exchange interaction and charge-charge Coulomb interaction are included simultaneously to determine the landscape of internal potential and the spin-dependent ac conductance. Gauge invariance and charge conservation are still satisfied. But spin current is not conserved. It is found that the exchange effects affect spin conductance dramatically, and hardly influence charge conductance. This shows the role of spin-accumulation in spin-dependent transport.
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