Critical behavior of the site diluted quantum anisotropic Heisenberg model in two dimensions
作者： L.S. Lima , A.S.T. Pires , B.V. Costa
DOI: 10.1016/J.PHYSA.2015.06.029
关键词: Quantum fluctuation 、 Quantum 、 Physics 、 Quantum mechanics 、 Quantum phase transition 、 Quantum phases 、 Heisenberg model 、 Percolation threshold 、 Condensed matter physics 、 Square lattice 、 Quantum Monte Carlo
摘要: Abstract In this work we use the Self Consistent Harmonic Approximation and Quantum Monte Carlo technique to study X Y on a two dimensional square lattice in presence of nonmagnetic impurities. particular discuss how site disorder changes Berezinskii–Kosterlitz–Thouless transition temperature, T B K . This temperature is determined as function density. Our results are consistent with an anomalous behavior at concentration close percolation threshold. We interpret due competition between confining vortices quantum fluctuations, or finite size effects.
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