Cluster expansion for dimerized spin systems
نویسندگان
چکیده
منابع مشابه
Spin systems with dimerized ground states
In view of the numerous examples in the literature it is attempted to outline a theory of Heisenberg spin systems possessing dimerized ground states (“DGS systems”) which comprises all known examples. Whereas classical DGS systems can be completely characterized, it was only possible to provide necessary or sufficient conditions for the quantum case. First, for all DGS systems the interaction b...
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We describe a Peierls dimerization which occurs in ferromagnetic spin chains at finite temperature, within the modified spin-wave theory. Usual spin-wave theory is modified by introducing a Lagrange multiplier which enforces a nonmagnetic state at finite temperature. It is shown that this method gives results in excellent agreement with the density–matrix renormalization group applied to transf...
متن کاملA theory of spin systems with dimerized ground states
In view of the numerous examples in the literature it is attempted to outline a theory of Heisenberg spin systems possessing dimerized ground states (“DGS systems”) which comprises all known examples. Whereas classical DGS systems can be completely characterized, it was only possible to provide necessary or sufficient conditions for the quantum case. First, for all DGS systems the interaction b...
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ژورنال
عنوان ژورنال: Applied Physics A: Materials Science & Processing
سال: 2002
ISSN: 0947-8396,1432-0630
DOI: 10.1007/s003390201529