The LDA+DMFT Approach to Materials with Strong Electronic Correlations (2009)
Published In, Karsten Held, Igor A. Nekrasov, Georg Keller, Volker Eyert, Nils Blümer, ...
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Determinant Quantum Monte Carlo Study of the Orbitally Selective Mott Transition (2009)
Bouadim, Karim, Batrouni, George G., Scalettar, Richard T.
We study the conductivity, density of states, and magnetic correlations of a two dimensional, two band fermion Hubbard model using determinant Quantum Monte Carlo (DQMC) simulations. We show that an...
Universal state diagrams for harmonically trapped bosons in optical lattices (2008)
Rigol, Marcos, Batrouni, George G., Rousseau, Valery G., Scalettar, Richard T.
We use quantum Monte-Carlo simulations to obtain universal zero temperature state diagrams for strongly correlated lattice bosons in one and two dimensions under the influence of a harmonic confining...
Disorder-Induced Stabilization of the Pseudogap in Strongly Correlated Systems (2008)
Chiesa, Simone, Chakraborty, Prabuddha B., Pickett, Warren E., Scalettar, Richard T.
The interplay of strong interaction and strong disorder, as contained in the Anderson-Hubbard model, is addressed using two non-perturbative numerical methods: the Lanczos algorithm in the grand...
Magnetic Moment Collapse-Driven Mott Transition in MnO (2008)
Alexey V. Lukoyanov, Vladimir I. Anisimov, Richard T. Scalettar, Warren E. Pickett
The metal-insulator transition in correlated electron systems, where electron states transform from itinerant to localized, has been one of the central themes of condensed matter physics for more...
Magnetic Moment Collapse-Driven Mott Transition in MnO (2007)
Kunes, Jan, Lukoyanov, Alexey V., Anisimov, Vladimir I., Scalettar, Richard T., Pickett, Warren E.
The metal-insulator transition in correlated electron systems, where electron states transform from itinerant to localized, has been one of the central themes of condensed matter physics for more...
Sengupta, Pinaki, Scalettar, Richard T., Singh, Rajiv R. P.
We use quantum Monte Carlo methods and single-mode approximation to study the magnon dispersion in the 2D half-filled Hubbard and phonon-coupled Heisenberg models. We find that in the Hubbard model...
Doping-dependent study of the periodic Anderson model in three dimensions (2001)
Paiva, Thereza, Esirgen, Gokhan, Scalettar, Richard T., Huscroft, Carey, McMahan, A. K.
We study a simple model for $f$-electron systems, the three-dimensional periodic Anderson model, in which localized $f$ states hybridize with neighboring $d$ states. The $f$ states have a strong...
Geometric frustration in the mixed layer pnictide oxides (2000)
Enjalran, Matthew, Scalettar, Richard T., Kauzlarich, Susan M.
We present results from a Monte Carlo investigation of a simple bilayer model with geometrically frustrated interactions similar to those found in the mixed layer pnictide oxides...
Phase-Locking of Vortex Lattices Interacting with Periodic Pinning (1999)
Reichhardt, Charles, Scalettar, Richard T., Zimanyi, Gergely T., Gronbech-Jensen, Niels
We examine Shapiro steps for vortex lattices interacting with periodic pinning arrays driven by AC and DC currents. The vortex flow occurs by the motion of the interstitial vortices through the...
Computational Study of Correlated Electrons. (1998)
Dagotto, Elbio, Moreo, Adriana, Scalettar, Richard T.
The Technical Objectives ot this project were (a) Study the phase diagram of models of strongly correlated electrons for the high temperature superconductors. (b) Study the development of magnetism...
Evolution of the Density of States Gap in a Disordered Superconductor (1998)
Huscroft, Carey, Scalettar, Richard T.
It has only recently been possible to study the superconducting state in the attractive Hubbard Hamiltonian via a direct observation of the formation of a gap in the density of states N(w). Here we...
The Phase Diagram of Disordered Vortices from London Langevin Simulations (1998)
Van Otterlo, Anne, Scalettar, Richard T., Zimanyi, Gergely T.
We study the phase diagram of vortex matter in disordered type-II superconductors. We performed numerical simulations in the London Langevin approximation, using a new realistic representation of the...
Revisiting the Theory of Finite Size Scaling in Disordered Systems: \nu Can Be Less Than 2/d (1997)
Pazmandi, Ferenc, Scalettar, Richard T., Zimanyi, Gergely T.
For phase transitions in disordered systems, an exact theorem provides a bound on the finite size correlation length exponent: \nu_{FS}
Magnetic Correlations in the Two Dimensional Anderson-Hubbard Model (1996)
Ulmke, Martin, Scalettar, Richard T.
The two dimensional Hubbard model in the presence of diagonal and off-diagonal disorder is studied at half filling with a finite temperature quantum Monte Carlo method. Magnetic correlations as well...
The Moving Glass Phase of Dirty Type II Superconductors (1996)
Moon, Kyungsun, Scalettar, Richard T., Zimanyi, Gergely T.
We study numerically the motion of vortices in dirty type II superconductors. In two dimensions at strong driving currents, vortices form highly correlated ``static channels''. The static structure...
Theory for Quantum Spin and Vortex Glasses (1996)
Pazmandi, Ferenc, Zimanyi, Gergely T., Scalettar, Richard T.
We develop a theory for the quantum vortex glass, with both the coupling strengths and the site energies disordered. This model is closely related to XY spin glasses and bosons in random media. For...
Superconductor-Insulator Transition in a Disordered Electronic System (1995)
Trivedi, Nandini, Scalettar, Richard T., Randeria, Mohit
We study an electronic model of a 2D superconductor with onsite randomness using Quantum Monte Carlo simulations. The superfluid density is used to track the destruction of superconductivity in the...