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Название: Exactly Solvable XY Model of the Spin Peierls Transition
Авторы: Brazovsky S., Dzyaloshinsky I.
Аннотация:
Journal of Statistical Physics, Vol. 38, Nos. 1/2, 1985. p. 115-124.
The exact solution of the problem of the ground state of the XY-spin system on a deformed chain is found. At finite magnetization m it is characterized by the double periodic structure and has a finite-band spectrum of spin excitations...