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Global-local ansatz and dynamical coherent potential approximation study of off-diagonal exciton-phonon coupling

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Global-local ansatz and dynamical coherent potential approximation study of off-diagonal exciton-phonon coupling

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dc.contributor.author Liu, Qingmei
dc.contributor.author Zhao, Yang
dc.contributor.author Wang, Weihua
dc.contributor.author Kato, Tsuyoshi
dc.date.accessioned 2011-03-07T01:11:23Z
dc.date.available 2011-03-07T01:11:23Z
dc.date.copyright 2009
dc.date.issued 2011-03-07T01:11:23Z
dc.identifier.citation Liu, Q., Zhao, Y., Wang, W., & Kato, T. (2009). Global-local ansatz and dynamical coherent potential approximation study of off-diagonal exciton-phonon coupling. Physical review B, (79), 1-14.
dc.identifier.uri http://hdl.handle.net/10220/6740
dc.description.abstract We study the generalized Holstein Hamiltonian in the simultaneous presence of diagonal and off-diagonal exciton-phonon couplings using the global-local Ansatz and the dynamical coherent potential approximation (under the Hartree approximation). The former yields detailed exciton-phonon correlations for polaron states in the lowest polaron energy band in addition to the state-of-the-art ground-state wave functions, while the latter reveals polaron dynamic information in the form of extended energy spectra and spectral density functions. Lowest polaron energy bands generated by the two methods are compared.
dc.format.extent 14 p.
dc.language.iso en
dc.relation.ispartofseries Physical review B
dc.rights © 2009 American Physical Society. This paper was published in Physical Review B and is made available as an electronic reprint (preprint) with permission of American Physical Society. The paper can be found at: [Doi: http://dx.doi.org/10.1103/PhysRevB.79.165105]. One print or electronic copy may be made for personal use only. Systematic or multiple reproduction, distribution to multiple locations via electronic or other means, duplication of any material in this paper for a fee or for commercial purposes, or modification of the content of the paper is prohibited and is subject to penalties under law.
dc.subject DRNTU::Science::Physics::Atomic physics::Solid state physics.
dc.title Global-local ansatz and dynamical coherent potential approximation study of off-diagonal exciton-phonon coupling
dc.type Journal Article
dc.contributor.school School of Materials Science and Engineering
dc.identifier.doi http://dx.doi.org/10.1103/PhysRevB.79.165105
dc.description.version Published version

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