Pseudospin Symmetry, Peierls Instability, and Charge Density Wave in a One-Dimensional Tight-Binding Model

Simple item page
dc.creatorShen, S. Q.
dc.creatorXie, X. C.
dc.date1995-07-19
dc.date.accessioned2026-07-07T03:07:49Z
dc.date.available2026-07-07T03:07:49Z
dc.descriptionWe show that there is pseudospin SU(2) symmetry in the one-dimensional tight-binding model with the inter-molecular electron-phonon interaction. We discuss the relation between the pseudospin symmetry breaking and the charge-density wave (CDW). For a finite lattice at half-filling, the Peierls instability drives the lattice to {\it dimerization} at low temperature, however, the system remains the SU(2) symmetry invariant and is not CDW state. An attractive on-site electron-electron interaction makes the pseudospin symmetry spontaneously broken in the thermodynamic limit and the CDW state arises as well. Hence, it is clear that spontaneous pseudospin symmetry breaking produces the CDW state.s the pseudospin symmetry spontaneously broken in the thermodynamic limit and the CDW state arises as well. Hence, it is clear that spontaneous pseudospin symmetry breaking produces the CDW state.
dc.description4 pages
dc.identifierhttps://arxiv.org/abs/cond-mat/9507075
dc.identifierhttp://arxiv.org/abs/cond-mat/9507075
dc.identifier.urihttp://salesiana.dossiersoluciones.com/handle/123456789/27315
dc.subjectCondensed Matter
dc.titlePseudospin Symmetry, Peierls Instability, and Charge Density Wave in a One-Dimensional Tight-Binding Model
dc.typetext

Files

Collections

arXiv