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VOLUME 96 (2012) | ISSUE 12 | PAGE 859
Electronic band structure and Fermi surface for new layered superconductor LaO0.5F0.5BiS2 in comparison with parent phase LaOFBiS2 from first principles
Abstract
By means of first-principles calculations, we have probed the peculiarities of the electronic band structure and Fermi surface for the recently discovered layered superconductor LaO0.5F0.5BiS2 in comparison with the parent phase LaOBiS2. The electronic factors promoting the transition of LaOBiS2 upon fluorine doping to superconducting state: inter-layer charge transfer, the evolution of the Fermi surface, and the dependence of the near-Fermi densities of states on x for LaO1-xFxBiS2 are evaluated and discussed in comparison with the available experiments.