Quantum critical transition from charge-ordered to superconducting state in the triangular lattice negative-U extended Hubbard model

Details Quantum critical transition from charge-ordered to superconducting state in the triangular lattice negative-U extended Hubbard model Quantum critical transition from charge-ordered to superconducting state in the triangular lattice negative-U extended Hubbard model

2008-02-07

arxiv.org/abs/0802.1011v1

Phys. Rev. B 77, 180515(R) (2008)

Physics

Condensed Matter

Strongly Correlated Electrons

4 pages, 6 EPS fig files

Scientific paper

10.1103/PhysRevB.77.180515

We demonstrate a robust frustration-driven charge-order to superconductivity transition in the half-filled negative-U extended Hubbard model. Superconductivity extends over a broad region of the parameter space. We argue that the model provides the correct insight to understanding unconventional superconductivity in the organic charge-transfer solids and other quarter-filled systems.

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