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8 papers · 1 filter
Many-body electronic structure and Kondo properties of cobalt-porphyrin molecules
Luis G. G. V. Dias da Silva, Murilo L. Tiago, Sergio E. Ulloa +2
We use a combination of first principles many-body methods and the numerical renormalization-group technique to study the Kondo regime of cobalt-porphyrin compounds adsorbed on a C…
Phonon-assisted tunneling and two-channel Kondo physics in molecular junctions
Luis G. Dias da Silva, Elbio Dagotto
The interplay between vibrational modes and Kondo physics is a fundamental aspect of transport properties of correlated molecular conductors. We present theoretical results for a s…
Tunable pseudogap Kondo effect and quantum phase transitions in Aharonov-Bohm interferometers
Luis G. G. V. Dias da Silva, Nancy Sandler, Pascal Simon +2
We study two quantum dots embedded in the arms of an Aharonov-Bohm ring threaded by a magnetic flux. The system can be described by an effective one-impurity Anderson model with an…
Real space first-principles derived semiempirical pseudopotentials applied to tunneling magnetoresistance
K. H. Bevan, Tony Low, H. Guo
In this letter we present a real space density functional theory (DFT) localized basis set semi-empirical pseudopotential (SEP) approach. The method is applied to iron and magnesiu…
Transport properties and Kondo correlations in nanostructures: the time-dependent DMRG method applied to quantum dots coupled to Wilson chains
Luis G. G. V. Dias da Silva, F. Heidrich-Meisner, A. E. Feiguin +4
We apply the adaptive time-dependent Density Matrix Renormalization Group method (tDMRG) to the study of transport properties of quantum-dot systems connected to metallic leads. Fi…
Finite-temperature conductance signatures of quantum criticality in double quantum dots
Luis G. Dias da Silva, Kevin Ingersent, Nancy Sandler +1
We study the linear conductance through a double-quantum-dot system consisting of an interacting dot in its Kondo regime and an effectively noninteracting dot, connected in paralle…