Abstract
We show that superconductivity is absent within the frac(1, 2)-filled band triangular lattice repulsive Hubbard model that has been proposed for organic charge-transfer solids. We posit that organic superconductivity is rather reached from a bond-charge density wave that either constitutes the insulating state proximate to superconductivity, or is extremely close in energy to the antiferromagnetic state, and replaces the latter under pressure. The bond-charge density wave can be described within an effective attractive U extended Hubbard Hamiltonian with repulsive nearest neighbor interaction V. A first-order transition from the insulating to the superconducting state occurs within the model with increasing frustration.
Original language | English (US) |
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Pages (from-to) | 2419-2421 |
Number of pages | 3 |
Journal | Synthetic Metals |
Volume | 159 |
Issue number | 21-22 |
DOIs | |
State | Published - Nov 2009 |
Keywords
- Correlated electrons
- Organic superconductors
- Unconventional superconductivity
ASJC Scopus subject areas
- Electronic, Optical and Magnetic Materials
- Condensed Matter Physics
- Mechanics of Materials
- Mechanical Engineering
- Metals and Alloys
- Materials Chemistry