Dimer-Quadrupolar Quantum Phase Transition in the Quasi-One-Dimensional Heisenberg Model with Biquadratic Interaction(Condensed matter: electronic structure and electrical, magnetic, and optical properties)

元データ 2007-01-15 社団法人日本物理学会

概要

The quasi-one-dimensional S=1 Heisenberg antiferromagnet with a biquadratic term is investigated at zero temperature by quantum Monte Carlo simulation. As the magnitude of the inter-chain coupling is increased, the system undergoes a phase transition from a spontaneously dimerized phase to a Neel ordered or spin nematic phase. The numerical results suggest the possibility of an unconventional second-order transition in which the symmetry group characterizing one phase is not a subgroup of the other.

著者

KAWASHIMA Naoki Institute for Solid State Physics, University of Tokyo
川島 直輝 Department Of Physics Tokyo Metropolitan University
Harada Kenji Department Of Cardiology Nagoya University Graduate School Of Medicine
TROYER Matthias Theoretische Physik, ETH Zurich
川島 直輝 Tokyo Metropolitan Univ. Tokyo
Kawashima Naoki Institute For Solid State Physics University Of Tokyo
Troyer Matthias Theoretische Physik Eidgenossische Technische Hochschule Zurich
Harada K Department Of Applied Analysis And Complex Dynamical Systems Graduate School Of Informatics Kyoto Un
Troyer M Theoretische Physik Eidgenossische Technische Hochschule Zurich
Harada Kenji Department Of Cardiology Chubu-rosai Hospital
Harada Kenji Department Of Applied Analysis And Complex Dynamical Systems Kyoto University

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