Nonlinear Amplitude-Phase Interaction in Charge-Density-Wave Systems

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概要

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• A nonlinear amplitude-phase interaction Hamiltonian is derived for charge-density-wave (CDW) systems from the microscopic Fr6hljch model. A perturba-tive formalism with the small parameter 1/Vp (g is the dimensionless massparameter of a CDW) is presented, and illustrated by calculating the amplitude-mode spectrum in one dimension. The calculation gives, without adjustableparameters, a quantitative explanation of the temperature dependence of thedamping constant observed in KCP by Raman experiments. This result, togetherwith the calculation of the metallic conductivity of TTF-TCNQ (S. Kurihara: J.Phys. Soc. Jpn. 44 (1978) 201 1 .), shows the importance of the nonlinear amplitude-phase interactions in CDW systems. It is suggested that some other dynamicaldegrees of freedom (most probably the motion of water molecules) should betaken into account to understand the behavior of the amplitude-mode frequencyin KCP.

• 社団法人日本物理学会の論文
• 1980-06-15

著者

• Kurihara Susumu

  Institute For Solid State Physics University Of Tokyo

関連論文

• Dynamics of Phase-Separated ^3He-^4He Films
• Exact Soliton Solution for Superfluid Film Dynamics
• Singlet Superfluidity in ^3He Film on ^4He Film
• Collective-Mode Conductivity of TTF-TCNQ in the Metallic Phase
• Nonlinear Amplitude-Phase Interaction in Charge-Density-Wave Systems

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