Two-Phase Coexistence in the Metallic State of Polyacetylene

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概要

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• We numerically determine the ground-state lattice configuration and infra-red absorption spectrum of a simple(strictly one-dimensional)model of a polyacetylene doped to metallic densities. Our model includes electron-electron interactions (treated in Hartree-Fock approximation)and interactions with the counter-ion lattice. Our chief results are: 1)The nature of the ground state is sensitive to minute details of the counter-ion arrangement, leading to the conclusion that small inhomogeneities in the counter-ion distribution can lead to the coexistence of more than one electronically distinct phase in the same sample. 2)The infra-red oscillator strength associated with the pinned soliton mode in a homogeneous phase is a strongly superlinear function of dopant concentration. We suggest that the coexistence of simple metallic and charge-density wave features in different experimental studies of heavily doped polyacetylene reflect the existence of coexisting metallic and soliton lattice regions.

• 理論物理学刊行会の論文
• 1993-10-20

著者

• Kivelson S

  Univ. California Ca Usa

• SALKOLA M.

  Theoretical Division, Los Alamos National Laboratory

• KIVELSON S.

  Department of Physics, University of California

• Salkola M.

  Theoretical Division Los Alamos National Laboratory

• Salkola M.I.

  Theoretical Division, Los Alamos National Laboratory

• Kivelson S.A.

  Department of Physics, University of California

関連論文

• Two-Phase Coexistence in the Metallic State of Polyacetylene
• A Viewpoint, Model and Theory for Supercooled Liquids

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