213 citations · 1.3k across the 34 of their papers we have counts for
10 papers · 1 filter
Ferromagnetism in armchair graphene nanoribbon heterostructures
P. A. Almeida, L. S. Sousa, Tome M. Schmidt +1
We study the properties of flat-bands that appear in a heterostructure composed of strands of different widths of graphene armchair nanoribbons. One of the flat-bands is reminiscen…
Spin-orbit coupling effects over thermoelectric transport properties in quantum dots
M. A. Manya, G. B. Martins, M. S. Figueira
We study the effects caused by Rashba and Dresselhaus spin-orbit coupling over the thermoelectric transport properties of a single-electron transistor, viz., a quantum dot connecte…
Fano-Andreev effect in T-shape double-quantum-dot in the Kondo regime
A. M. Calle, M. Pacheco, G. B. Martins +3
In the present work, we investigate the electronic transport through a T-shape double quantum dot system coupled to two normal leads and to one superconducting lead. We explore the…
Transport properties of a two impurity system: a theoretical approach
I. J. Hamad, L. Costa Ribeiro, G. B. Martins +1
A system of two interacting cobalt atoms, at varying distances, was studied in a recent scanning tunneling microscope experiment by Bork et. al.[Nature Phys. 7, 901 (2011)]. We pro…
Full electrostatic control over polarized currents through spin-orbital Kondo effect
Carlos A. Busser, Adrian E. Feiguin, George B. Martins
Numerical calculations indicate that by suitably controlling the individual gate voltages of a capacitively coupled parallel double quantum dot, with each quantum dot coupled to on…
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…
New Numerical Results Indicate a Half-Filling SU(4) Kondo State in Carbon Nanotubes
C. A. Busser, G. B. Martins
Numerical calculations simulate transport experiments in carbon nanotube quantum dots (P. Jarillo-Herrero et al., Nature 434, 484 (2005)), where a strongly enhanced Kondo temperatu…
Electron Transport through a Molecular Conductor with Center-of-Mass Motion
K. A. Al-Hassanieh, C. A. Büsser, G. B. Martins +1
The linear conductance of a molecular conductor oscillating between two metallic leads is investigated numerically both for Hubbard interacting and noninteracting electrons. The mo…
Prediction of Ferromagnetic Correlations in Coupled Double-Level Quantum Dots
G. B. Martins, C. A. Busser, K. A. Al-Hassanieh +2
Numerical results are presented for transport properties of two coupled double-level quantum dots. The results strongly suggest that under appropriate circumstances the dots can de…
Interference Effects in the Conductance of Multi-Level Quantum Dots
C. A. Büsser, G. B. Martins, K. A. Al-Hassanieh +2
Using exact-diagonalization techniques supplemented by a Dyson equation embedding procedure, the transport properties of multilevel quantum dots are investigated in the Kondo regim…