Correlated electronic structures and the phase diagram of hydrocarbon-based superconductors

We have investigated correlated electronic structures and the phase diagram of electron-doped hydrocarbon molecular solids, based on the dynamical mean-field theory. We have found that the ground state of hydrocarbon-based superconductors such as electron-doped picene and coronene is a multi-band Fe...

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Published inNew journal of physics Vol. 15; no. 11; pp. 113030 - 10
Main Authors Kim, Minjae, Choi, Hong Chul, Shim, Ji Hoon, Min, B I
Format Journal Article
LanguageEnglish
Published IOP Publishing 13.11.2013
Subjects
Correlation
Electronic structure
Fermi liquids
Hydrocarbons
Metal-insulator transition
Phase diagrams
Superconductivity
Superconductors
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Summary:We have investigated correlated electronic structures and the phase diagram of electron-doped hydrocarbon molecular solids, based on the dynamical mean-field theory. We have found that the ground state of hydrocarbon-based superconductors such as electron-doped picene and coronene is a multi-band Fermi liquid, while that of non-superconducting electron-doped pentacene is a single-band Fermi liquid in the proximity of the metal-insulator transition. The size of the molecular orbital energy level splitting plays a key role in producing the superconductivity of electron-doped hydrocarbon solids. The multi-band nature of hydrocarbon solids would boost the superconductivity through the enhanced density of states at the Fermi level.
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ISSN:1367-2630
1367-2630
DOI:10.1088/1367-2630/15/11/113030