9,054 research outputs found
Dwarf galaxies in the Local Group: the VLT perspective
Recent results on the evolution of Local Group dwarf galaxies obtained from
VLT imaging and spectroscopy are briefly reviewed, and prospects for dwarf
galaxy research at the VLT are discussed in the light of the current and
forthcoming instrumentation. Some aspects of future instrument developments,
such as deep wide-field imaging at both optical and near-infrared wavelengths
that may be of advantage for research on the evolution of dwarf galaxies, are
briefly discussed.Comment: 6 pages, 3 figures. To be published in the Proceedings of the ESO
Workshop Scientific Drivers for ESO Future VLT/VLTI Instrumentation, J.
Bergeron and G. Monnet, Eds., Springer Verlag 200
Doped Mott insulator as the origin of heavy Fermion behavior in LiV2O4
We investigate the electronic structure of LiV2O4, for which heavy fermion
behavior has been observed in various experiments, by the combination of the
local density approximation and dynamical mean field theory. To obtain results
at zero temperature, we employ the projective quantum Monte Carlo method as an
impurity solver. Our results show that the strongly correlated a1g band is a
lightly doped Mott insulator which -at low temperatures- shows a sharp (heavy)
quasiparticle peak just above the Fermi level, which is consistent with recent
photoemission experiment by Shimoyamada et al. [Phys. Rev. Lett. 96 026403
(2006)].Comment: 4 pages, 5 figure
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