Spin exchange in quantum rings and wires in the Wigner-crystal limit
نویسنده
چکیده
We present a controlled method for computing the exchange coupling in strongly correlated one-dimensional electron systems. It is based on the asymptotically exact relation between the exchange constant and the paircorrelation function of spinless electrons. Explicit results are obtained for thin quantum rings with realistic Coulomb interactions, by calculating this function via a many-body instanton approach. PACS numbers: 71.10.Pm, 73.21.Hb, 73.22.-f Submitted to: J. Phys.: Condens. Matter
منابع مشابه
Exchange interaction in quantum rings and wires in the Wigner-crystal limit
We present a controlled method for computing the exchange coupling in correlated one-dimensional electron systems based on the relation between the exchange constant and the pair-correlation function of spinless electrons. This relation is valid in several independent asymptotic regimes, including the low-electron-density case, under the general condition of a strong spin-charge separation. Exp...
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تاریخ انتشار 2005