A strange metal with a small Fermi surface and strong collective excitations

Details A strange metal with a small Fermi surface and strong collective excitations A strange metal with a small Fermi surface and strong collective excitations

2004-09-19

arxiv.org/abs/cond-mat/0409491v2

Phys. Rev. B71, 195116 (2005).

Physics

Condensed Matter

Superconductivity

12 pages, 7 figures

Scientific paper

10.1103/PhysRevB.71.195116

We develop a theory of a hybrid state, where quasi-particles coexist with strong collective modes, taking as a starting point a model of infinitely many 1D Mott insulators coupled by a weak interchain tunneling. This state exists at an intermediate temperature range and undergoes an antiferromagnetic phase transition at temperatures much smaller than the Mott-Hubbard gap. The most peculiar feature of the hybrid state is that the volume of the Fermi surface is unrelated to the electron density. We present a self-consistent derivation of the low energy effective action for our model.

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