Breakup of the Fermi surface near the Mott transition in low-dimensional systems

Details Breakup of the Fermi surface near the Mott transition in low-dimensional systems Breakup of the Fermi surface near the Mott transition in low-dimensional systems

2006-02-13

arxiv.org/abs/cond-mat/0602304v2

Phys. Rev. Lett. 97, 136401 (2006)

Physics

Condensed Matter

Strongly Correlated Electrons

REVTeX 4, 5 pages, 4 EPS figures. References added; problem with figure 4 fixed; typos corrected

Scientific paper

10.1103/PhysRevLett.97.136401

We investigate the Mott transition in weakly-coupled one-dimensional (1d) fermionic chains. Using a generalization of Dynamic Mean Field Theory, we show that the Mott gap is suppressed at some critical hopping $t_{\perp}^{c2}$. The transition from the 1d insulator to a 2d metal proceeds through an intermediate phase where the Fermi surface is broken into electron and hole pockets. The quasiparticle spectral weight is strongly anisotropic along the Fermi surface, both in the intermediate and metallic phases. We argue that such pockets would look like `arcs' in photoemission experiments.

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