We investigate the behavior of antiferromagnetic integer-spin chains in a staggered magnetic field, by means of the density-matrix renormalization group, carefully addressing the role of finite-size effects within the Haldane phase at small fields. In the case of spin S = 2, we determine the dependence of the ground-state energy and magnetization on the external field. in the thermodynamic limit. and show how the peculiar finite-size behavior can be connected with the crossover in the ground state from a spin liquid to a polarized Neel state. RI Capone, Massimo/A-7762-2008

Antiferromagnetic integer-spin chains in a staggered magnetic field: Approaching the thermodynamic limit through the infinite-size density-matrix renormalization group

Capone, Massimo;
2001-01-01

Abstract

We investigate the behavior of antiferromagnetic integer-spin chains in a staggered magnetic field, by means of the density-matrix renormalization group, carefully addressing the role of finite-size effects within the Haldane phase at small fields. In the case of spin S = 2, we determine the dependence of the ground-state energy and magnetization on the external field. in the thermodynamic limit. and show how the peculiar finite-size behavior can be connected with the crossover in the ground state from a spin liquid to a polarized Neel state. RI Capone, Massimo/A-7762-2008
2001
64
18
Capone, Massimo; Caprara, S.
File in questo prodotto:
Non ci sono file associati a questo prodotto.

I documenti in IRIS sono protetti da copyright e tutti i diritti sono riservati, salvo diversa indicazione.

Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/20.500.11767/14475
Citazioni
  • ???jsp.display-item.citation.pmc??? ND
  • Scopus 8
  • ???jsp.display-item.citation.isi??? 8
social impact