Quasiparticle dispersion near the Fermi
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A. Bourgeois; A.A. Aligia; T. Kroll; M.D. NΓΊΓ±ez-Regueiro
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Article
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2007
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Elsevier Science
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English
β 543 KB
We construct an effective Hamiltonian for the motion of t 2g highly correlated states in Na x CoO 2 . This three-band model includes the indirect Co-O-Co hopping t and the crystal-field splitting 3D. Calculations in a CoO 6 cluster give the effective parameters t = 100 meV and 3D = 315 meV. The Hami