Unconventional superconductivity near a flat band in organic and organometallic materials

Jaime Merino; Manuel Fernández López; Ben J. Powell

doi:10.1103/PhysRevB.103.094517

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Unconventional superconductivity near a flat band in organic and organometallic materials

Jaime Merino, Manuel Fernández López, Ben J. Powell

DOI 10.1103/PhysRevB.103.094517 · Physical Review B

T1

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Abstract

We study electron correlation driven superconductivity on a decorated honeycomb lattice (DHL), which has a low-energy flat band. On doping, we find singlet superconductivity with extended-s, extended-d, and f-wave symmetry mediated by magnetic exchange. f-wave singlet pairing is enabled by the lattice decoration. The critical temperature is predicted to be significantly higher than on similar lattices lacking flat bands. We discuss how high-temperature superconductivity could be realized in the DHL materials such as Rb3TT·2H2O and Mo3S7(dmit)3.

Source-reported materials — not catalogue approval

Formula	Reported Tc (K)	Pressure (GPa)	Type
Rb3TT·2H2O Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula.	—	Pressure not reported	unknown
Mo3S7(dmit)3 Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula.	—	Pressure not reported	unknown
LiC6 Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula.	—	Pressure not reported	unknown