Abstract
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.
| Original language | English |
|---|---|
| Article number | 237001 |
| Journal | Physical Review Letters |
| Volume | 116 |
| Issue number | 23 |
| DOIs | |
| Publication status | Published - Jun 7 2016 |
| Externally published | Yes |
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ASJC Scopus subject areas
- Physics and Astronomy(all)
Cite this
Evidence for Eight-Node Mixed-Symmetry Superconductivity in a Correlated Organic Metal. / Guterding, Daniel; Diehl, Sandra; Altmeyer, Michaela; Methfessel, Torsten; Tutsch, Ulrich; Schubert, Harald; Lang, Michael; Müller, Jens; Huth, Michael; Jeschke, Harald Olaf; Valentí, Roser; Jourdan, Martin; Elmers, Hans Joachim.
In: Physical Review Letters, Vol. 116, No. 23, 237001, 07.06.2016.Research output: Contribution to journal › Article
}
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
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.
UR - http://www.scopus.com/inward/record.url?scp=84974691633&partnerID=8YFLogxK
UR - http://www.scopus.com/inward/citedby.url?scp=84974691633&partnerID=8YFLogxK
U2 - 10.1103/PhysRevLett.116.237001
DO - 10.1103/PhysRevLett.116.237001
M3 - Article
VL - 116
JO - Physical Review Letters
JF - Physical Review Letters
SN - 0031-9007
IS - 23
M1 - 237001
ER -