New Mean-Field Theory of theModel Applied to High-Superconductors
- 26 July 2005
- journal article
- Published by American Physical Society (APS) in Physical Review Letters
- Vol. 95 (5) , 057001
- https://doi.org/10.1103/physrevlett.95.057001
Abstract
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.Keywords
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