Thermodynamic Property of the Δ-Chain
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概要
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A one-dimensional fully frustrated quantum spin system called the ⊿-chain is investigated, particularly with respect to the low-temperature structure of the specific heat, by quantum Monte Carlo simulations using the restructuring method. Sizes of the systems we considered are N=32, 48 and 64. The simulation results together with the diagonalization results for N=10 and 16 show that the size dependence of the data is very weak, and thus the second peak of the specific heat stably exists at T<0.1, which corresponds to less than half the spin gap. Locality of excitations is seen in the Monte Carlo snapshot. We consider that the low-temperature properties of this system are governed by the local elementary excitations which generate the Schottky-type specific heat peak in the background of the ordinary thermal specific heat.
- 社団法人日本物理学会の論文
- 1995-03-15
著者
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Nakamura Tota
Institute Of Physics Tsukuba University
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Nakamura Tota
Institute Of Physics University Of Tsukuba
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Saika Yohei
Department of Physics, Tokyo Institute of Technology
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Saika Y
Wakayama National Coll. Technol. Wakayama
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Saika Yohei
Department Of Electrical Engineering Wakayama National College Of Technology
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