Phonon Dynamics in Peierls Systems
نویسندگان
چکیده
منابع مشابه
Peierls Dimerization with Nonadiabatic Spin-Phonon Coupling
We study the magnetic properties of a frustrated Heisenberg spin chain with a dynamic spin-phonon interaction. Using Lanczos diagonalization that preserves the full lattice dynamics, we explore the nonadiabatic regime with phonon frequencies comparable to the exchange coupling energy, which is, for example, the relevant limit for the spin-Peierls compound CuGeO3. Compared to the static limit of...
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Exciton effects on soliton and bipolaron lattice states are investigated using an electron-lattice Peierls model with long-range Coulomb interactions. The Hartree-Fock (HF) approximation and the single-excitation configurationinteraction (single-CI) method are used to obtain optical absorption spectra. We discuss the following properties: (1) The attraction between the excited electron and the ...
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The theory of Boffi et al. of Peierls stresses in crystals is criticized on physical grounds on a number of points.
متن کاملFluctuation effects in disordered Peierls systems
Abstract. We review the density of states and related quantities of quasi one-dimensional disordered Peierls systems in which fluctuation effects of a backscattering potential play a crucial role. The low-energy behavior of non-interacting fermions which are subject to a static random backscattering potential will be described by the fluctuating gap model (FGM). Recently, the FGM has also been ...
متن کاملOrdered phases in spin-Peierls systems
The microscopic description of spin-Peierls substances is discussed. Particular attention is paid to the ordered (dimerised and incommensurably modulated) phases. Important points are the adiabatic and the antiadiabatic approach, generic soliton forms, elastic and magnetic interchain couplings. The wealth and the accuracy of experimental information collected for the first inorganic spin-Peierl...
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ژورنال
عنوان ژورنال: Progress of Theoretical Physics
سال: 1982
ISSN: 0033-068X,1347-4081
DOI: 10.1143/ptp.67.1305