The Two-Dimensional S=1 Quantum Heisenberg Antiferromagnet at Finite Temperatures

元データ 1998-04-15 社団法人日本物理学会


The temperature dependence of the correlation length, susceptibilities and the magnetic struc-ture factor of the two-dimensional spin-l sqtrare lattice quanturn Heisenberg antiferromagnetare comptrted by the qtuanturn Nlonte Carlo loop algorithna (QIVIC). In the experirnentally rel-evant temperature reginae the theoretically predicted asyrnptotic loxv temperature behavior isfound to be not valid. The QNIC restrlts however, agree reasonably well xvith the experimentalmeastrrernents of LazNi0,j even withotrt considering anisotropies in the exchange interactions.


川島 直輝 Department Of Physics Tokyo Metropolitan University
川島 直輝 Tokyo Metropolitan Univ. Tokyo
TROYER Matthias Institut fur theoretische Physik, ETH Zurich
KAWASHIMA Naoki Department of Physics, Tokyo Metropolitan University
Troyer Matthias Institiute For Solid State Physics University Of Tokyo
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 Division of Applied Systems Science,Kyoto University
Kawashima Naoki Department Of Physics Toho University
Kawashima Naoki Department Of Physics Faculty Of Science University Of Tokyo
Harada Kenji Division Of Applied Systems Science Kyoto University