Model Evidence of an Anisotropic Chiral d plus id-Wave Pairing State for the Water-Intercalated NaxCoO2 • yH2O Superconductor

被引：78

作者：

Kiesel, Maximilian L. ^{[1
]}

Platt, Christian ^{[1
]}

Hanke, Werner ^{[1
]}

Thomale, Ronny ^{[1
,2
]}

机构：

[1] Univ Wurzburg, Inst Theoret Phys, D-97074 Wurzburg, Germany

[2] Ecole Polytech Fed Lausanne, Inst Theorie Phenomenes Phys, CH-1015 Lausanne, Switzerland

来源：

PHYSICAL REVIEW LETTERS | 2013年 / 111卷 / 09期

关键词：

D O I：

10.1103/PhysRevLett.111.097001

中图分类号：

O4 [物理学];

学科分类号：

0702 ;

摘要：

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.

引用

页数：5

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