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Numerical modeling of the central spin problem using the spin coherent states P-representation
K. A. Al-Hassanieh, V. V. Dobrovitski, E. Dagotto +1
In this work, we consider decoherence of a central spin by a spin bath. In order to study the non-perturbative decoherence regimes, we develop an efficient mean-field-based method…
Phase Fluctuations in Strongly Coupled -Wave Superconductors
M. Mayr, G. Alvarez, C. Sen +1
We present a numerically exact solution for the BCS Hamiltonian at any temperature, including the degrees of freedom associated with classical phase, as well as amplitude, fluctuat…
Study of the One- and Two-Band Models for Colossal Magnetoresistive Manganites Using the Truncated Polynomial Expansion Method
C. Sen, G. Alvarez, Y. Motome +5
Considerable progress has been recently made in the theoretical understanding of the colossal magnetoresistance (CMR) effect in manganites. The analysis of simple models with two c…
Complexity in Strongly Correlated Electronic Systems
Elbio Dagotto
A wide variety of experimental results and theoretical investigations in recent years have convincingly demonstrated that several transition metal oxides and other materials, have…
Role of the Dzyaloshinskii-Moriya interaction in multiferroic perovskites
I. A. Sergienko, E. Dagotto
With the perovskite multiferroic RMnO3 (R = Gd, Tb, Dy) as guidance, we argue that the Dzyaloshinskii-Moriya interaction (DMI) provides the microscopic mechanism for the coexistenc…
Spin, charge, and orbital correlations in the one-dimensional t2g-orbital Hubbard model
Jose Xavier, Hiroaki Onishi, Takashi Hotta +1
We present the zero-temperature phase diagram of the one-dimensional t2g-orbital Hubbard model, obtained using the density-matrix renormalization group and Lanczos techniques. Emph…
Effect of inhomogeneity on s-wave superconductivity in the attractive Hubbard model
K. Aryanpour, E. R. Dagotto, M. Mayr +3
Inhomogeneous s-wave superconductivity is studied in the two-dimensional, square lattice attractive Hubbard Hamiltonian using the Bogoliubov-de Gennes (BdG) mean field approximatio…
Transport properties of strongly correlated electrons in quantum dots using a simple circuit model
G. B. Martins, C. A. Busser, K. A. Al-Hassanieh +3
Numerical calculations are shown to reproduce the main results of recent experiments involving nonlocal spin control in nanostructures (N. J. Craig et al., Science 304, 565 (2004))…
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…
The One-Particle Spectral Function and the Local Density of States in a Phenomenological Mixed-Phase Model for High-Temperature Superconductors
M. Mayr, A. Gonzalez, A. Moreo +1
The dynamical properties of a recently introduced phenomenological model for high temperature superconductors are investigated. In the clean limit, it was observed that none of the…