Peierls instability and optical response in the one--dimensional half--filled Holstein model of spinless fermions

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dc.creatorWeiße, A.
dc.creatorFehske, H.
dc.date1998-03-20
dc.date1998-07-28
dc.date.accessioned2026-07-07T03:10:09Z
dc.date.available2026-07-07T03:10:09Z
dc.descriptionThe effects of quantum lattice fluctuations on the Peierls transition are studied within the one--dimensional Holstein molecular crystal model by means of exact diagonalization methods. Applying a very efficient variational Lanczos technique, the ground--state phase diagram is obtained in excellent agreement with predictions of recent density matrix renormalization group calculations. The transition to the charge--density--wave regime is signaled by a strong increase in the charge structure factor. In the metallic regime, the non--universal Luttinger liquid parameters (charge velocity and coupling constant) are deduced from a finite--size scaling analysis. The variational results are supported by a complete numerical solution of the quantum phonon Holstein model on small clusters, which is based on a well--controlled phonon Hilbert space truncation procedure. The metallic and charge--density--wave phases are characterized by significant differences in the calculated optical absorption spectra.
dc.description16 pages, 8 figures, submitted to Phys. Rev. B
dc.identifierhttps://arxiv.org/abs/cond-mat/9803245
dc.identifierhttp://arxiv.org/abs/cond-mat/9803245
dc.identifierPhys. Rev. B 58, 13526 (1998)
dc.identifierdoi:10.1103/PhysRevB.58.13526
dc.identifier.urihttp://salesiana.dossiersoluciones.com/handle/123456789/28155
dc.subjectStrongly Correlated Electrons
dc.titlePeierls instability and optical response in the one--dimensional half--filled Holstein model of spinless fermions
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