136 citations · 333 across the 21 of their papers we have counts for
21 papers
Disorder-induced instability of a Weyl nodal loop semimetal towards a diffusive topological metal with protected multifractal surface states
João S. Silva, Miguel Gonçalves, Eduardo V. Castro +2
Weyl nodal loop semimetals are gapless topological phases that, unlike their insulator counterparts, may be unstable to small perturbations that respect their topology-protecting s…
Delocalization of topological surface states by diagonal disorder in nodal loop semimetals
João Silva, Miguel A. N. Araújo, Miguel Gonçalves +2
The effect of Anderson diagonal disorder on the topological surface (``drumhead'') states of a Weyl nodal loop semimetal is addressed. Since diagonal disorder breaks chiral symmetr…
Disorder driven multifractality transition in Weyl nodal loops
Miguel Gonçalves, Pedro Ribeiro, Eduardo V. Castro +1
The effect of short-range disorder in nodal line semimetals is studied by numerically exact means. For arbitrary small disorder, a novel semimetallic phase is unveiled for which th…
Chern band insulators in magnetic field
Miguel A. N. Araújo, Eduardo V. Castro
The effect of a magnetic field on a two-dimensional Chern band insulator is discussed. It is shown that, unlike the trivial insulator, an anomalous Hall insulator with Chern number…
Emergent Nesting of the Fermi Surface from Local-Moment Description of Iron-Pnictide High-Tc Superconductors
J. P. Rodriguez, M. A. N. Araujo, P. D. Sacramento
We uncover the low-energy spectrum of a t-J model for electrons on a square lattice of spin-1 iron atoms with 3dxz and 3dyz orbital character by applying Schwinger-boson-slave-ferm…
Hubbard-model description of the high-energy spin-spectral-weight distribution in La(2)CuO(4)
J. M. P. Carmelo, M. A. N. Araujo, S. R. White +1
The spectral-weight distribution in recent neutron scattering experiments on the parent compound LaCuO (LCO), which are limited in energy range to about 450\,meV, is studie…