Spontaneous dimer order, excitation spectrum and quantum-phase transitions in the J1-J2 Heisenberg model

Author: Kotov Valeri N.   Oitmaa Jaan   Sushkov Oleg   Weihong Zheng  

Publisher: Taylor & Francis Ltd

ISSN: 1463-6417

Source: Philosophical Magazine B, Vol.80, Iss.8, 2000-07, pp. : 1483-1498

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Abstract