Symmetry breaking and finite size scaling in antiferromagnets

Autor:	Bertrand Delamotte, D. Mouhanna, Patrick Azaria
Rok vydání:	1993
Předmět:	Condensed matter physics General Engineering Statistical and Nonlinear Physics Expectation value Excited state Quantum mechanics Condensed Matter::Strongly Correlated Electrons Limit (mathematics) Symmetry breaking Ground state Quantum Scaling Mathematics Non-linear sigma model
Zdroj:	Journal de Physique I. 3:291-298
ISSN:	1286-4862 1155-4304
DOI:	10.1051/jp1:1993130
Popis:	We show that the finite size scaling analysis of the quantum non linear sigma model O(3)/O(2) associated with antiferromagnets justifies the existence of the tower of excited states first proposed by Anderson to explain the symmetry breaking of quantum antiferromagnets in the thermodynamical limit. Finite size formulas for the ground state energy and for the ground state expectation value of the order parameter are explicitly given
Databáze:	OpenAIRE
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