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Magnetic and Metallic State at Intermediate Hubbard U Coupling in Multiorbital Models for Undoped Fe Pnictides
Rong Yu, Kien T. Trinh, Adriana Moreo +4
Multi-orbital Hubbard model Hamiltonians for the undoped parent compounds of the Fe-pnictide superconductors are here investigated using mean-field techniques. For a realistic four…
Metal-insulator transition in superlattices
Shuai Dong, Rong Yu, Seiji Yunoki +3
The modulation of charge density and spin order in (LaMnO)/(SrMnO) (=1-4) superlattices is studied via Monte Carlo simulations of the double-exchange model. G…
Origin of the multiferroic spiral spin-order in the RMnO3 perovskites
Shuai Dong, Rong Yu, Seiji Yunoki +2
The origin of the spiral spin-order in perovskite multiferroic manganites MnO ( Tb or Dy) is here investigated using a two -orbitals double-exchange model.…
Transport properties and Kondo correlations in nanostructures: the time-dependent DMRG method applied to quantum dots coupled to Wilson chains
Luis G. G. V. Dias da Silva, F. Heidrich-Meisner, A. E. Feiguin +4
We apply the adaptive time-dependent Density Matrix Renormalization Group method (tDMRG) to the study of transport properties of quantum-dot systems connected to metallic leads. Fi…
A Novel Approach to Study Highly Correlated Nanostructures: The Logarithmic Discretization Embedded Cluster Approximation
E. V. Anda, G. Chiappe, C. A. Busser +4
This work proposes a new approach to study transport properties of highly correlated local structures. The method, dubbed the Logarithmic Discretization Embedded Cluster Approximat…
Ferromagnetic tendency at the surface of CE charge-ordered manganites
Shuai Dong, Rong Yu, Seiji Yunoki +2
Most previous investigations have shown that the surface of a ferromagnetic material may have antiferromagnetic tendencies. However, experimentally the opposite effect has been rec…
Model for the Magnetic Order and Pairing Channels in Fe Pnictide Superconductors
M. Daghofer, A. Moreo, J. A. Riera +3
A two-orbital model for Fe-pnictide superconductors is investigated using computational techniques on two-dimensional square clusters. The hopping amplitudes are derived from orbit…
Excitons in the One-Dimensional Hubbard Model: a Real-Time Study
K. A. Al-Hassanieh, F. A. Reboredo, A. E. Feiguin +2
We study the real-time dynamics of a pair hole/doubly-occupied-site, namely a holon and a doublon, in a 1D Hubbard insulator with on-site and nearest-neighbor Coulomb repulsion. Ou…
Robust d-wave Pairing Correlations in the Heisenberg Kondo Lattice Model
J. C. Xavier, E. Dagotto
The Kondo lattice model enlarged by an antiferromagnetic coupling between the localized spins is here investigated using computational techniques. Our results suggest…
Fermi Arcs in the Superconducting Clustered State for Underdoped Cuprates
G. Alvarez, E. Dagotto
The one-particle spectral function of a state formed by superconducting (SC) clusters is studied via Monte Carlo techniques. The clusters have similar SC amplitudes but randomly di…
Study of Short-distance Spin and Charge Correlations and Local Density-of-States in the CMR regime of the One-Orbital Model for Manganites
Rong Yu, Shuai Dong, Cengiz Sen +2
The metal-insulator transition, and the associated magnetic transition, in the colossal magnetoresistance (CMR) regime of the one-orbital model for manganites is here studied using…
Large Magnetoresistance in a Manganite Spin-Tunnel-Junction Using LaMnO3 as Insulating Barrier
S. Yunoki, E. Dagotto, S. Costamagna +1
A spin-tunnel-junction based on manganites, with LaSrMnO (LSMO) as ferromagnetic metallic electrodes and the undoped parent compound LaMnO (LMO) as insulating b…
Charge transfer in heterostructures of strongly correlated materials
I. Gonzalez, S. Okamoto, S. Yunoki +2
In this manuscript, recent theoretical investigations by the authors in the area of oxide multilayers are briefly reviewed. The calculations were carried out using model Hamiltonia…
Ground-state reference systems for expanding correlated fermions in one dimension
F. Heidrich-Meisner, M. Rigol, A. Muramatsu +2
We study the sudden expansion of strongly correlated fermions in a one-dimensional lattice, utilizing the time-dependent density-matrix renormalization group method. Our focus is o…