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

F. H. L. Essler·A. M. Tsvelik
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Abstract

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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F. H. L. Essler, A. M. Tsvelik. 2005-01-19. A strange metal with a small Fermi surface and strong collective excitations. https://doi.org/10.1103/physrevb.71.195116

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