Microscopic theory of the pseudogap and Peierls transition in quasi-one-dimensional materials

Details Microscopic theory of the pseudogap and Peierls transition in quasi-one-dimensional materials Microscopic theory of the pseudogap and Peierls transition in quasi-one-dimensional materials

1995-08-24

arxiv.org/abs/cond-mat/9508107v1

Phys. Rev. B 52, 16428 (1995)

Physics

Condensed Matter

21 pages, RevTeX, 5 figures in uuencoded compressed tar file

Scientific paper

10.1103/PhysRevB.52.16428

The problem of deriving from microscopic theory a Ginzburg-Landau free energy functional to describe the Peierls or charge-density-wave transition in quasi-one-dimensional materials is considered. Particular attention is given to how the thermal lattice motion affects the electronic states. Near the transition temperature the thermal lattice motion produces a pseudogap in the density of states at the Fermi level. Perturbation theory diverges and the traditional quasi-particle or Fermi liquid picture breaks down. The pseudogap causes a significant modification of the coefficients in the Ginzburg-Landau functional from their values in the rigid lattice approximation, which neglects the effect of the thermal lattice motion. To appear in Physical Review B.

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