62 citations · 160 across the 9 of their papers we have counts for
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Effective Hamiltonian for transition-metal compounds. Application to Na_xCoO_2
A. A. Aligia, T. Kroll
We describe a simple scheme to construct a low-energy effective Hamiltonian H_eff for highly correlated systems containing non-metals like O, P or As (O in what follows) and a tran…
Electronic structure and Fermi surface tolopogy of NaCoO
A. Bourgeois, A. A. Aligia, T. Kroll +1
We construct an effective Hamiltonian for the motion of T2g highly correlated states in NaxCoO2. We solve exactly a multiband model in a CoO6 cluster with electronic occupation cor…
Quasiparticle dispersion near the Fermi surface in NaCoO
A. Bourgeois, A. A. Aligia, T. Kroll +1
We construct an effective Hamiltonian for the motion of t2g highly correlated states in NaxCoO2. This three-band model includes the indirect Co-O-Co hopping t and the crystal-field…
Polarization dependence of x-ray absorption spectra in Na_xCoO_2
T. Kroll, A. A. Aligia, G. A. Sawatzky
In order to shed light on the electronic structure of Na_xCoO_2, and motivated by recent Co L-edge X-ray absorption spectra (XAS) experiments with polarized light, we calculate the…