Effect of a symmetry-breaking field on the ground state of the spin-1/2 antiferromagnetic linear chain

Shigeyoshi Mori, Jong Jae Kim, Isao Harada

Research output: Contribution to journalArticle

21 Citations (Scopus)

Abstract

We investigate the ground-state property of the one-dimensional spin-1/2 antiferromagnetic XXZ chain in a symmetry-breaking field, by means of numerical diagonalization method for finite-size spin systems combined with the phenomenological renormalization group method. It is found that, with increasing field, there occurs the ground-state phase transition from an ordered phase to a disordered phase, whose critical property belongs to the universality class of the transverse Ising model. The ground-state phase diagram is determined in two parameter regions; (i) an Ising-like region and (ii) an XY-like region. Our inspection of the field dependence of the energy gap and the static spin structure factors reveals that the ordered phase in both regions exhibits the characteristics of Neel order. Quantum nature of the ground state is also briefly discussed.

Original languageEnglish
Pages (from-to)3409-3415
Number of pages7
JournalJournal of the Physical Society of Japan
Volume64
Issue number9
Publication statusPublished - Sep 1995

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broken symmetry
ground state
renormalization group methods
Ising model
inspection
phase diagrams

Keywords

  • Antiferromagnetic XXZ chain
  • Ground-state phase diagram
  • Symmetry-breaking field

ASJC Scopus subject areas

  • Physics and Astronomy(all)

Cite this

Effect of a symmetry-breaking field on the ground state of the spin-1/2 antiferromagnetic linear chain. / Mori, Shigeyoshi; Kim, Jong Jae; Harada, Isao.

In: Journal of the Physical Society of Japan, Vol. 64, No. 9, 09.1995, p. 3409-3415.

Research output: Contribution to journalArticle

Mori, Shigeyoshi ; Kim, Jong Jae ; Harada, Isao. / Effect of a symmetry-breaking field on the ground state of the spin-1/2 antiferromagnetic linear chain. In: Journal of the Physical Society of Japan. 1995 ; Vol. 64, No. 9. pp. 3409-3415.
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