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Type: Artigo de periódico
Title: Numerical Test Of Finite-size Corrections For The Anisotropic Heisenberg Antiferromagnet Chain
Author: Medeiros D.
Cabrera G.G.
Abstract: A leading exponential dependence of the mass gap with size has been numerically tested in the whole axial-anisotropy region for the spin-1/2 XXZ antiferromagnetic chain. Exact results for finite chains are obtained via a modified Lanczos method due to Paige, allowing calculations up to N=28 spins. Our results show that the ground state is doubly degenerate and displays long-range order throughout the whole anisotropic regime. © 1991 The American Physical Society.
Rights: aberto
Identifier DOI: 10.1103/PhysRevB.44.848
Date Issue: 1991
Appears in Collections:Unicamp - Artigos e Outros Documentos

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