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Exchange Coupling in a One-Dimensional Wigner Crystal | A. D. Klironomos
; R. R. Ramazashvili
; K. A. Matveev
; | Date: |
5 Apr 2005 | Subject: | Mesoscopic Systems and Quantum Hall Effect | cond-mat.mes-hall | Abstract: | We consider a long quantum wire at low electron densities. In this strong interaction regime a Wigner crystal may form, in which electrons comprise an antiferromagnetic Heisenberg spin chain. The coupling constant J is exponentially small, as it originates from tunneling of two neighboring electrons through the segregating potential barrier. We study this exponential dependence, properly accounting for the many-body effects and the finite width of the wire. | Source: | arXiv, cond-mat/0504118 | Services: | Forum | Review | PDF | Favorites |
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