Low energy electronic states and triplet pairing in layered cobaltates

Details Low energy electronic states and triplet pairing in layered cobaltates Low energy electronic states and triplet pairing in layered cobaltates

2005-10-03

arxiv.org/abs/cond-mat/0510051v1

Phys. Rev. Lett. 93, 176401 (2004)

Physics

Condensed Matter

Strongly Correlated Electrons

4 pages, 3 figures

Scientific paper

10.1103/PhysRevLett.93.176401

The structure of the low-energy electronic states in layered cobaltates is considered starting from the Mott insulating limit. We argue that the coherent part of the wave-functions and the Fermi-surface topology at low doping are strongly influenced by spin-orbit coupling of the correlated electrons on the $t_{2g}$ level. An effective t-J model based on mixed spin-orbital states is radically different from that for the cuprates, and supports unconventional, pseudospin-triplet pairing.

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