Model Evidence of an Anisotropic Chirald+id-Wave Pairing State for the Water-IntercalatedNaxCoO2·yH2OSuperconductor

Autor:	Werner Hanke, Maximilian L. Kiesel, Christian Platt, Ronny Thomale
Rok vydání:	2013
Předmět:	Superconductivity Physics Condensed matter physics Phase (matter) Pairing General Physics and Astronomy Fermi surface Singlet state Renormalization group Anisotropy Topology (chemistry)
Zdroj:	Physical Review Letters. 111
ISSN:	1079-7114 0031-9007
DOI:	10.1103/physrevlett.111.097001
Popis:	Since its discovery, the superconducting phase in water-intercalated sodium cobaltates Na(x)CoO2·yH2O (x∼0.3, y∼1.3) has posed fundamental challenges in terms of experimental investigation and theoretical understanding. By a combined cluster calculation and renormalization group approach, we find an anisotropic chiral d+id-wave state as a consequence of multiorbital effects, Fermi surface topology, and magnetic fluctuations. It naturally explains the singlet property and close-to-nodal gap features of the superconducting phase as indicated by experiments.
Databáze:	OpenAIRE
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