title: Fermi surface of NaxCoO2.
abstract: Doping evolution of the Fermi surface topology of Na(x)CoO(2) is studied systematically. Both local density approximation (LDA) and local spin density approximation (LSDA) predict a large Fermi surface as well as small hole pockets for doping levels x approximately 0.5. In contrast, the hole pockets are completely absent for all doping levels within LSDA+U. More importantly, we find no violation of Luttinger's rule in this system. The measured Fermi surface of Na(0.7)CoO(2) can be explained by its half-metallic behavior and agrees with our LSDA+U calculations.
authors.affiliation: Department of Physics, University of California at Berkeley, Berkeley, CA 94720, USA
authors.forename: Peihong
authors.initials: P
authors.lastname: Zhang
authors.forename: Weidong
authors.initials: W
authors.lastname: Luo
authors.forename: Marvin L
authors.initials: ML
authors.lastname: Cohen
authors.forename: Steven G
authors.initials: SG
authors.lastname: Louie