Superconductivity in Strongly Repulsive Fermions: The Role of Kinetic-Energy Frustration
L. Isaev, G. Ortiz, C. D. Batista
DOI 10.1103/PhysRevLett.105.187002 · Physical Review Letters
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Abstract
We discuss a physical mechanism of a non-BCS nature which can stabilize a superconducting state in a strongly repulsive electronic system. By considering the two-dimensional Hubbard model with spatially modulated electron hoppings, we demonstrate how kinetic-energy frustration can lead to robust d-wave superconductivity at arbitrarily large on-site repulsion. This phenomenon should be observable in experiments using fermionic atoms, e.g. K40, in specially prepared optical lattices.
Source-reported materials — not catalogue approval
| Formula | Reported Tc (K) | Pressure (GPa) | Type |
|---|---|---|---|
| K40 Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula. | — | Pressure not reported | unknown |
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