New mean field theory of the tt't''J model applied to the high-Tc superconductors

Details New mean field theory of the tt't''J model applied to the high-Tc superconductors New mean field theory of the tt't''J model applied to the high-Tc superconductors

2004-10-28

arxiv.org/abs/cond-mat/0410750v3

Phys. Rev. Lett. 95, 057001 (2005)

Physics

Condensed Matter

Superconductivity

4 pages, 2 figures. Homepage http://dao.mit.edu/~wen/

Scientific paper

10.1103/PhysRevLett.95.057001

We introduce a new mean field approach to the tt't''J model that incorporates both electron-like quasiparticle and spinon excitations as suggested by some experiments and numerical studies. It leads to a mean field phase diagram which is consistent with that of hole and electron doped cuprates. Moreover, it provides a framework to describe the observed evolution of the electron spectral function from the undoped insulator to the overdoped Fermi metal for both hole and electron doping. The theory also provides a new non-BCS mechanism leading to superconductivity.

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