Thermodynamic Properties of the One-Dimensional Kondo Insulators Studied by the Density Matrix Renormalization Group Method
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概要
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Thermodynamic properties of the one-dimensional Kondo lattice model at half-filling are stud-led by the density matrix renormalization group method applied to the quantum transfer matrix.Spin susceptibility, charge susceptibility, and specific heat are calculated down to T : 0.1Z forvarious exchange constants. The obtained results clearly indicate crossover behavior from thehigh-temperature regime of nearly independent localized spins and conduction electrons to thelow-temperature regime where the two degrees of freedom couple strongly, The low-temperatureenergy scales of the charge and spin susceptibilities are determined and are equal to the quasi-particle gap and the spin gap, respectively, for weak exchange couplings.
- 社団法人日本物理学会の論文
- 1998-04-15
著者
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UEDA Kazuo
Institute for Solid State Physics, University of Tokyo
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Sigrist Manfred
Theoretische Physik Eth-honggerberg
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Shibata Naokazu
Institute Of Applied Physics University Of Tsukuba
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Shibata Naokazu
Institiute For Solid State Physics University Of Tokyo
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TROYER Matthias
Institut fur theoretische Physik, ETH Zurich
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Troyer Matthias
Institiute For Solid State Physics University Of Tokyo
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AMMON Beat
Theoretische Physik,ETH-Honggerberg
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Ammon Beat
Theoretische Physik Eth-honggerberg
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Sigrist Manfred
Theoretische Physik
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Sigrist Manfred
Theoretische Physik Eth-honggerberg:yukawa Institute For Theoretical Physics Kyoto University
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Ueda Kazuo
Institiute For Solid State Physics University Of Tokyo
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