Universality in the three-dimensional random bond quantum Heisenberg antiferromagnet

Article

关键词: PHASE-TRANSITION;    MONTE-CARLO;    DISORDER;    FLUCTUATIONS;    TEMPERATURE;    IMPURITIES;    ORDER;   

DOI  :  10.1103/PhysRevB.102.064411

来源: SCIE

【 摘 要 】

The three-dimensional quenched random bond diluted (J(1) - J(2)) quantum Heisenberg antiferromagnet is studied on a simple-cubic lattice. Using extensive stochastic series expansion quantum Monte Carlo simulations, we perform very long runs for an LxLxL lattice up to L = 48. By employing a standard finite-size scaling method, the numerical values of the Neel temperature are determined with high precision as a function of the coupling ratio r = J(2)/J(1). Based on the estimated critical exponents, we find that the critical behavior of the considered model belongs to the pure classical three-dimensional O(3) Heisenberg universality class.

【 授权许可】

Free