Field-induced quantum phase transitions in S = 1/2 J1-J2 Heisenberg model on square lattice

Katsuhiro Morita, Naokazu Shibata

Research output: Contribution to journalArticle

8 Citations (Scopus)

Abstract

We study the magnetic field dependence of the ground state of the S = 1/2 J1-J2 Heisenberg model on the square lattice by the density matrix renormalization group (DMRG) method. With the use of the sine-square deformation, we obtain eight different ground states including plaquette valence-bond crystal with a finite spin gap, transverse Néel, transverse stripe, 1/2 magnetization plateau with up-up-up-down (uuud), and three new states we named the Y-like, V-like, and Ψ states around J2/J1 = 0.55-0.6. The phase transitions from the transverse Néel (at J2/J1 = 0.55) and stripe (at J2/J1 = 0.6) states to the uuud and Y-like states, respectively, are discontinuous, as in the case of a spin flop.

Original languageEnglish
Article number094708
Journaljournal of the physical society of japan
Volume85
Issue number9
DOIs
Publication statusPublished - 2016 Sep 15

ASJC Scopus subject areas

  • Physics and Astronomy(all)

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