Annotation
We studied spin interactions within the strong coupling approximation using a contour representation of operators. Based on this representation, the exchange interaction potential was found. It was shown that the effective exchange interaction is caused not only by pair correlations, but has a more complex origin that depends on four-particle interactions.
Received: 2011 June 15
Approved: 2012 March 21
PACS:
71.10.-w Theories and models of many-electron systems
© 2016 Publisher M.V.Lomonosov Moscow State University
Authors
M.K. Bakhnyan, B.I. Sadovnikov, A.M. Savchenko
Faculty of Physics, Moscow State University, Moscow, 119991, Russia
Faculty of Physics, Moscow State University, Moscow, 119991, Russia
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