Spin-Peierls ground states and frustration in a multi-band Peierls-Hubbard model

Details Spin-Peierls ground states and frustration in a multi-band Peierls-Hubbard model Spin-Peierls ground states and frustration in a multi-band Peierls-Hubbard model

1992-11-21

arxiv.org/abs/cond-mat/9211014v2

Physics

Condensed Matter

4 pp, 4 fig in 2 postscript files (appended), table format corrected, in revtex, NRaD.9211.002.GAM

Scientific paper

10.1103/PhysRevLett.70.3498

We discuss the consequences of including both electron-phonon and electron-electron couplings in multi-band models, focusing on numerical studies of a one-dimensional two-band model in the intermediate regime for both coupling strengths. Spin-Peierls as well as long-period, frustrated ground states are identified, reminisent of those found in antiferromagnetic next-nearest neighbor (ANNNI) models. We speculate on experimentally observable signatures of this rich phase diagram. 1992 PACS: 75.30.Fv, 71.45.Lr, 71.38+i, 64.70.Rh

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