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          Institute: MPI für Chemische Physik fester Stoffe     Collection: publications 2013     Display Documents



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ID: 671330.0, MPI für Chemische Physik fester Stoffe / publications 2013
Evidence from tunneling spectroscopy for a quasi-one-dimensional origin of superconductivity in Sr2RuO4
Authors:Firmo, I. A.; Lederer, S.; Lupien, C.; Mackenzie, A. P.; Davis, J. C.; Kivelson, S. A.
Language:English
Date of Publication (YYYY-MM-DD):2013-10-28
Title of Journal:Physical Review B
Volume:88
Issue / Number:13
Start Page:134521-1
End Page:134521-9
Sequence Number of Article:134521
Review Status:not specified
Audience:Not Specified
Abstract / Description:To establish the mechanism of unconventional superconductivity in Sr2RuO4, a prerequisite is direct information concerning the momentum-space structure of the energy gaps Delta(i) (k), and in particular whether the pairing strength is stronger ("dominant") on the quasi-one-dimensional (alpha and beta) or on the quasi-two-dimensional (gamma) Fermi surfaces. We present scanning tunneling microscopy measurements of the density of states spectra in the superconducting state of Sr2RuO4 for 0.1T(c) < T < T-c and analyze them along with published thermodynamic data using a simple phenomenological model. We show that our observation of a single superconducting gap scale with maximum value 2 Delta approximate to 5T(c) along with a spectral shape indicative of line nodes is consistent, within a weak-coupling model, with magnetically mediated odd-parity superconductivity generated by dominant, near-nodal, Cooper pairing on the alpha and beta bands.
External Publication Status:published
Document Type:Article
Communicated by:Ina Werner
Affiliations:MPI für chemische Physik fester Stoffe
Identifiers:ISI:000326159000004 [ID No:1]
ISSN:1098-0121 [ID No:2]
DOI:10.1103/PhysRevB.88.134521
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