Physics – Condensed Matter – Strongly Correlated Electrons
Scientific paper
2006-12-05
Phys.Rev.Lett.99:046404,2007
Physics
Condensed Matter
Strongly Correlated Electrons
4 pages, 2 figures: Correct version to appear in PRL. Revisions include a derivation of the electron operator at low energies
Scientific paper
10.1103/PhysRevLett.99.046404
We construct the low energy theory of a doped Mott insulator, such as the high-temperature superconductors, by explicitly integrating over the degrees of freedom far away from the chemical potential. For either hole or electron doping, a charge 2e bosonic field emerges at low energy. The charge 2e boson mediates dynamical spectral weight transfer across the Mott gap and creates a new charge e excitation by binding a hole. The result is a bifurcation of the electron dispersion below the chemical potential as observed recently in angle-resolved photoemission on Pb-doped Bi_2Sr_2CaCu_2O_{8+\delta} (Pb2212).
Choy Ting-Pong
Leigh Robert G.
Phillips Philip
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