TY - JOUR
T1 - Evidence for Eight-Node Mixed-Symmetry Superconductivity in a Correlated Organic Metal
AU - Guterding, Daniel
AU - Diehl, Sandra
AU - Altmeyer, Michaela
AU - Methfessel, Torsten
AU - Tutsch, Ulrich
AU - Schubert, Harald
AU - Lang, Michael
AU - Müller, Jens
AU - Huth, Michael
AU - Jeschke, Harald Olaf
AU - Valentí, Roser
AU - Jourdan, Martin
AU - Elmers, Hans Joachim
N1 - Publisher Copyright:
© 2016 American Physical Society.
Copyright:
Copyright 2016 Elsevier B.V., All rights reserved.
PY - 2016/6/7
Y1 - 2016/6/7
N2 - We report on a combined theoretical and experimental investigation of the superconducting state in the quasi-two-dimensional organic superconductor κ-(ET)2Cu[N(CN)2]Br. Applying spin-fluctuation theory to a low-energy, material-specific Hamiltonian derived from ab initio density functional theory we calculate the quasiparticle density of states in the superconducting state. We find a distinct three-peak structure that results from a strongly anisotropic mixed-symmetry superconducting gap with eight nodes and twofold rotational symmetry. This theoretical prediction is supported by low-temperature scanning tunneling spectroscopy on in situ cleaved single crystals of κ-(ET)2Cu[N(CN)2]Br with the tunneling direction parallel to the layered structure.
AB - We report on a combined theoretical and experimental investigation of the superconducting state in the quasi-two-dimensional organic superconductor κ-(ET)2Cu[N(CN)2]Br. Applying spin-fluctuation theory to a low-energy, material-specific Hamiltonian derived from ab initio density functional theory we calculate the quasiparticle density of states in the superconducting state. We find a distinct three-peak structure that results from a strongly anisotropic mixed-symmetry superconducting gap with eight nodes and twofold rotational symmetry. This theoretical prediction is supported by low-temperature scanning tunneling spectroscopy on in situ cleaved single crystals of κ-(ET)2Cu[N(CN)2]Br with the tunneling direction parallel to the layered structure.
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U2 - 10.1103/PhysRevLett.116.237001
DO - 10.1103/PhysRevLett.116.237001
M3 - Article
AN - SCOPUS:84974691633
VL - 116
JO - Physical Review Letters
JF - Physical Review Letters
SN - 0031-9007
IS - 23
M1 - 237001
ER -