Stiffness of the Heisenberg Spin-Glass Model at Zero- and Finite-Temperatures in Three Dimensions : General Physics
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概要
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We examine the stiffness of the Heisenberg spin-glass (SG) model at both zero temperature (T = 0) and finite temperatures (T ≠ 0) in three dimensions. We calculate the excess energies at T = 0 which are gained by rotating and reversing all the spins on one surface of the lattice, and find that they increase with the lattice size L. We also calculate the excess free-energies at T ≠ 0 which correspond to these excess energies, and find that they increase with L at low temperatures, while they decrease with increasing L at high temperatures. These results strongly suggest the occurrence of the SG phase at low temperatures. The SG phase transition temperature is estimated to be T_<SG> ~ 0.19J from the lattice size dependences of these excess free-energies .
- 社団法人日本物理学会の論文
- 2001-06-15
著者
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MATSUBARA Fumitaka
Department of Applied Physics, Tohoku University
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SHIRAKURA Takayuki
Faculty of Humanities and Social Sciences, Iwate University
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ENDOH Shin-ichi
Department of Applied Physics, Tohoku University
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Endoh Shin-ichi
Department Of Applied Physics Tohoku University
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Shirakura Takayuki
Faculty Of Humanities And Social Science Iwate University
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Matsubara Fumitaka
Department Of Applied Physics Faculty Of Engineering The University Of Tohoku
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