Model Evidence of an Anisotropic Chiral d plus id-Wave Pairing State for the Water-Intercalated NaxCoO2 center dot yH(2)O Superconductor

Since its discovery, the superconducting phase in water-intercalated sodium cobaltates NaxCoO2 center dot yH(2)O (x similar to 0.3, y similar to 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.


Published in:
Physical Review Letters, 111, 9
Year:
2013
Publisher:
College Pk, Amer Physical Soc
ISSN:
0031-9007
Laboratories:




 Record created 2013-10-01, last modified 2018-03-17


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