PMID- 22076047
OWN - NLM
STAT- PubMed-not-MEDLINE
DCOM- 20120821
LR  - 20120503
IS  - 1361-648X (Electronic)
IS  - 0953-8984 (Linking)
VI  - 23
IP  - 47
DP  - 2011 Nov 30
TI  - Variational study of the quantum phase transition in the bilayer Heisenberg model 
      with bosonic RVB wavefunction.
PG  - 475602
LID - 10.1088/0953-8984/23/47/475602 [doi]
AB  - We study the ground state phase diagram of the bilayer Heisenberg model on a 
      square lattice with a bosonic resonating valence bond (RVB) wavefunction. The 
      wavefunction has the form of a Gutzwiller projected Schwinger boson mean-field 
      ground state and involves two variational parameters. We find the wavefunction 
      provides an accurate description of the system on both sides of the quantum phase 
      transition. In particular, through the analysis of the spin structure factor, 
      ground state fidelity susceptibility and the Binder moment ratio Q(2), a 
      continuous transition from the antiferromagnetic ordered state to the quantum 
      disordered state is found at the critical coupling of alpha(c) = J( perpendicular)/J( parallel)  approximately  2.62, in 
      good agreement with the result of quantum Monte Carlo simulation. The critical 
      exponent estimated from the finite size scaling analysis (1/nu  approximately  1.4) is 
      consistent with that of the classical 3D Heisenberg universality class.
FAU - Liao, Haijun
AU  - Liao H
AD  - Department of Physics, Renmin University of China, Beijing 100872, People's 
      Republic of China.
FAU - Li, Tao
AU  - Li T
LA  - eng
PT  - Journal Article
PT  - Research Support, Non-U.S. Gov't
DEP - 20111110
PL  - England
TA  - J Phys Condens Matter
JT  - Journal of physics. Condensed matter : an Institute of Physics journal
JID - 101165248
EDAT- 2011/11/15 06:00
MHDA- 2011/11/15 06:01
CRDT- 2011/11/15 06:00
PHST- 2011/11/15 06:00 [entrez]
PHST- 2011/11/15 06:00 [pubmed]
PHST- 2011/11/15 06:01 [medline]
AID - 10.1088/0953-8984/23/47/475602 [doi]
PST - ppublish
SO  - J Phys Condens Matter. 2011 Nov 30;23(47):475602. doi: 
      10.1088/0953-8984/23/47/475602. Epub 2011 Nov 10.