Record Details

Title:
Cobalt adatoms on graphene: Effects of anisotropies on the correlated electronic structure
Affiliation(s):
XFEL.EU staff, Other
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Abstract:
Impurities on surfaces experience a geometric symmetry breaking induced not only by the on-site crystal-field splitting and the orbital-dependent hybridization, but also by different screening of the Coulomb interaction in different directions. We present a many-body study of the Anderson impurity model representing a Co adatom on graphene, taking into account all anisotropies of the effective Coulomb interaction, which we obtained by the constrained random-phase approximation. The most pronounced differences are naturally displayed by the many-body self-energy projected onto the single-particle states. For the solution of the Anderson impurity model and analytical continuation of the Matsubara data, we employed new implementations of the continuous-time hybridization expansion quantum Monte Carlo and the stochastic optimization method, and we verified the results in parallel with the exact diagonalization method.
Imprint:
American Physical Society, 2018
Journal Information:
Physical Review B, 97 (8), 085133 (2018)
External related publications:
Language(s):
English


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 Record created 2018-07-11, last modified 2018-07-19

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