TY - JOUR
T1 - Field-induced quantum phase transitions in S = 1/2 J1-J2 Heisenberg model on square lattice
AU - Morita, Katsuhiro
AU - Shibata, Naokazu
N1 - Funding Information:
The present work was supported by a Grant-in-Aid for Scientific Research (No. 26400344) from JSPS.
Publisher Copyright:
©2016 The Physical Society of Japan.
PY - 2016/9/15
Y1 - 2016/9/15
N2 - 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.
AB - 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.
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U2 - 10.7566/JPSJ.85.094708
DO - 10.7566/JPSJ.85.094708
M3 - Article
AN - SCOPUS:84984893128
VL - 85
JO - Journal of the Physical Society of Japan
JF - Journal of the Physical Society of Japan
SN - 0031-9015
IS - 9
M1 - 094708
ER -