178 citations · 2.2k across the 68 of their papers we have counts for
7 papers · 1 filter
Magnetic exchange mechanism for electronic gap opening in graphene
T. G. Rappoport, M. Godoy, B. Uchoa +2
We show within a local self-consistent mean-field treatment that a random distribution of magnetic adatoms can open a robust gap in the electronic spectrum of graphene. The electro…
Kondo Quantum Criticality of Magnetic Adatoms in Graphene
Bruno Uchoa, T. G. Rappoport, A. H. Castro Neto
We examine the exchange Hamiltonian for magnetic adatoms in graphene with localized inner shell states. On symmetry grounds, we predict the existence of a class of orbitals that le…
Magnetism and magnetotransport in disordered graphene
T. G. Rappoport, Bruno Uchoa, A. H. Castro Neto
We perform Monte Carlo simulations to study the interplay of structural and magnetic order in single layer graphene covered with magnetic adatoms. We propose that the presence of r…
Experimental observation of quantum entanglement in low dimensional spin systems
T. G. Rappoport, L. Ghivelder, J. C. Fernandes +2
We report macroscopic magnetic measurements carried out in order to detect and characterize field-induced quantum entanglement in low dimensional spin systems. We analyze the pyrob…
Griffiths phases in the strongly disordered Kondo necklace model
Tatiana G. Rappoport, Beatriz Boechat, Andreia Saguia +1
The effect of strong disorder on the one-dimensional Kondo necklace model is studied using a perturbative real-space renormalization group approach which becomes asymptotically exa…
Phase diagram of the Kondo necklace: a mean-field renormalization group approach
Tatiana G. Rappoport, M. A. Continentino
In this paper we investigate the magnetic properties of heavy fermions in the antiferromagnetic and dense Kondo phases in the framework of the Kondo necklace model. We use a mean f…
Short-range antiferromagnetic correlations in Kondo insulators
Tatiana G. Rappoport, M. S. Figueira, M. A. Continentino
We study the influence of short range antiferromagnetic correlations between local -electrons on the transport and thermodynamic properties of Kondo insulators, as first propose…