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Quasiparticle Dispersion and Heat Capacity of<mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" display="inline"><mml:msub><mml:mi>Na</mml:mi><mml:mn>0.3</mml:mn></mml:msub><mml:msub><mml:mi>CoO</mml:mi><mml:mn>2</mml:mn></mml:msub></mml:math>: A Dynamical Mean-Field Theory Study
We use the dynamical mean-field theory to calculate the Fermi surface and heat capacity for ${\mathrm{Na}}_{0.3}{\mathrm{CoO}}_{2}$. We resolve the conflicting outcomes of previous calculations by demonstrating that the nature of the calculated Fermi surface depends sensitively upon the bare Hamiltonian, and, in particular, the crystal-field splitting. By calculating both the …