Theory of the Lightly Doped Mott Insulator

Details Theory of the Lightly Doped Mott Insulator Theory of the Lightly Doped Mott Insulator

2010-05-22

arxiv.org/abs/1005.4127v1

Physics

Condensed Matter

Strongly Correlated Electrons

9 pages, 3 figures

Scientific paper

A theory for the Hubbard model appropriate in the limit of large U/t, small doping away from half-filling and short-ranged antiferromagnetic spin correlations is presented. Despite the absence of any broken symmetry the Fermi surface takes the form of elliptical hole pockets centered near (pi/2,pi/2) with a volume proportional to the hole concentration. Short range antiferromagnetic correlations render the nearest neighbor hopping almost ineffective so that only second or third nearest neighbor hopping contributes appreciably to the dispersion relation.

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