One-Dimensional Isotropic Spin-1/2 Heisenberg Magnet with Ferromagnetic Nearest-Neighbor and Antiferromagnetic Next-Nearest-Neighbor Interactions
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概要
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We study the ground-state and finite-temperature properties of the one-dimensional isotropic spin-172 Heisenberg magnet with ferromagnetic nearest-neighborand antiferromagnetic next-nearest-neighbor interactions which compete with eachother. Extrapolating the exact results for finite-size systems of up to 20 spins, we estimate the ground-state energy and the ground-state two-spin correlation function inthe infinite-size limit. Using the cluster transfer matrix method, we also calculate thetemperature dependence of the internal energy and the specific heat and that of the in-verse correlation length and the wave number, by both of which the asymptoticbehavior of the two-spin correlation function in the long-distance limit is character-ized. We compare the results of these calculations with those obtained previously forthe case where the nearest-neighbor interaction is antiferromagnetic.ground-state properties, finite-temperature properties, one-dimensional system,spin-1 / 2 Heisenberg antiferromagnet, competing interactions, exact diagonaliza-Lion for finite-size systems, cluster transfer matrix method
- 社団法人日本物理学会の論文
- 1989-08-15
著者
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Harada I
Okayama Univ. Okayama
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Harada Isao
Institute For Solid State Physics University Of Tokyo
-
Harada Isao
Department Of Physics Faculty Of Science Kobe University
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Tonegawa Takashi
Department Of Earth And Environmental Sciences Graduate School Of Environmental Studies Nagoya Unive
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Tonegawa Takashi
Faculty Of Engineering Fukui University Of Technology
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HARADA Isao
Department of Physics, Kobe University : Department of Physics, Okayama University
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