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Type: Artigo de periódico
Title: Numerical Study Of Antiferromagnetic Heisenberg Chains For Spin S= 1 2, Using The Lanczos Method
Author: Medeiros D.
Cabrera G.G.
Abstract: Finite spin chains up to N=28 spins, have been solved in exact numerical form by means of the Lanczos method, in the whole axial-anisotropic region of the XXZ model. We obtain the finite-size behavior of the mass gap as a function of the anistropy, yielding a leading exponential dependence with size. At the isotropic point, size effects are in the form of power-law and logarithmic corrections. Long-range order is estimated through the correlation functions of the finite chain. © 1992.
Citation: Journal Of Magnetism And Magnetic Materials. , v. 104-107, n. PART 2, p. 799 - 800, 1992.
Rights: fechado
Identifier DOI: 10.1016/0304-8853(92)90365-U
Date Issue: 1992
Appears in Collections:Unicamp - Artigos e Outros Documentos

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