6533b7d4fe1ef96bd126334f

RESEARCH PRODUCT

Disorder-induced gap in the normal density of states of the organic superconductorκ-(BEDT-TTF)2Cu[N(CN)2]Br

Martin JourdanTorsten MethfesselSandra DiehlJens MüllerUlrich TutschMichael LangMichael HuthHans-joachim Elmers

subject

Local density of statesMaterials scienceCondensed matter physicsCondensed Matter::SuperconductivityScanning tunneling spectroscopyOrganic superconductorCondensed Matter::Strongly Correlated ElectronsGeneral Materials ScienceCondensed Matter PhysicsNormal density

description

The local density of states (DOS) of the organic superconductor κ-(BEDT-TTF)2Cu[N(CN)2]Br, measured by scanning tunneling spectroscopy on in situ cleaved surfaces, reveals a logarithmic suppression near the Fermi edge persisting above the critical temperature T(c). The experimentally observed suppression of the DOS is in excellent agreement with a soft Hubbard gap as predicted by the Anderson-Hubbard model for systems with disorder. The electronic disorder also explains the diminished coherence peaks of the quasi-particle DOS below T(c).

yearjournalcountryeditionlanguage
2015-06-15Journal of Physics: Condensed Matter
https://doi.org/10.1088/0953-8984/27/26/265601