Low energy electronic states and triplet pairing in layered cobaltate |
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Authors: | Khaliullin G Koshibae W Maekawa S |
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Institution: | Max-Planck-Institut für Festk?rperforschung, Heisenbergstrasse 1, D-70569 Stuttgart, Germany. |
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Abstract: | 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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