Eric C. Andrade

  • Citations Per Year
Learn More
Hourglass-shaped magnetic excitation spectra have been detected in a variety of doped transition-metal oxides with stripelike charge order. Compared to the predictions of spin-wave theory for perfect stripes, these spectra display a different intensity distribution and anomalous broadening. Here we show, based on a comprehensive modeling for La5/3Sr1/3CoO4,(More)
Motivated by the intrinsic non-Fermi-liquid behavior observed in the heavy-fermion quasicrystal Au51Al34Yb15, we study the low-temperature behavior of dilute magnetic impurities placed in metallic quasicrystals. We find that a large fraction of the magnetic moments are not quenched down to very low temperatures T, leading to a power-law distribution of(More)
We investigate the effects of disorder within the T = 0 Brinkman-Rice scenario for the Mott metal-insulator transition in two dimensions. For sufficiently weak disorder the transition retains the Mott character, as signaled by the vanishing of the local quasiparticle weights Z_{i} and strong screening of the renormalized site energies at criticality. In(More)
E. C. Andrade, E. Miranda, and V. Dobrosavljević Department of Physics and National High Magnetic Field Laboratory, Florida State University, Tallahassee, Florida 32306, USA Instituto de Fı́sica Gleb Wataghin, Unicamp, Caixa Postal 6165, Campinas, São Paulo 13083-970, Brazil (Received 6 August 2008; published 20 May 2009) We investigate the effects of(More)
H. Javan Mard, E. C. Andrade, E. Miranda, and V. Dobrosavljevi¢ Department of Physics and National High Magnetic Field Laboratory, Florida State University, Tallahassee, FL 32306 Institut für Theoretische Physik, Technische Universität Dresden, 01062 Dresden, Germany Instituto de Física Gleb Wataghin, Unicamp, R. Sérgio Buarque de Holanda, 777, Campinas, SP(More)
The Heisenberg-Kitaev model is a paradigmatic model to describe the magnetism in honeycomb-lattice Mott insulators with strong spin-orbit coupling, such as A_{2}IrO_{3} (A=Na, Li) and α-RuCl_{3}. Here, we study in detail the physics of the Heisenberg-Kitaev model in an external magnetic field. Using a combination of Monte Carlo simulations and spin-wave(More)
Strongly correlated materials with strong spin-orbit coupling hold promise for realizing topological phases with fractionalized excitations. Here, we propose a chiral spin-orbital liquid as a stable phase of a realistic model for heavy-element double perovskites. This spin liquid state has Majorana fermion excitations with a gapless spectrum characterized(More)