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Large-Scale Monte Carlo Study of a Realistic Lattice Model for Ga_(1-x)Mn_xAs
Yucel Yildirim, Gonzalo Alvarez, Adriana Moreo +1
The properties of Mn-doped GaAs are studied at several doping levels and hole compensations, using a real-space Hamiltonian on an fcc lattice that reproduces the valence bands of u…
Hyperfine interaction induced decoherence of electron spins in quantum dots
Wenxian Zhang, V. V. Dobrovitski, K. A. Al-Hassanieh +2
We investigate in detail, using both analytical and numerical tools, the decoherence of electron spins in quantum dots (QDs) coupled to a bath of nuclear spins in magnetic fields o…
Ferroelectricity in the Magnetic E-Phase of Orthorhombic Perovskites
I. A. Sergienko, C. Sen, E. Dagotto
We show that the symmetry of the spin zigzag chain E phase of the orthorhombic perovskite manganites and nickelates allows for the existence of a finite ferroelectric polarization.…
Metallic interface at the boundary between band and Mott insulators
S. S. Kancharla, E. Dagotto
Motivated by experiments on atomically smooth layers of LaTiO, a Mott insulator, sandwiched between layers of SrTiO, a band insulator, a simple model for such heterostructu…
Dynamical Mean-Field Study of the Ferromagnetic Transition Temperature of a Two-Band Model for Colossal Magnetoresistance Materials
F. Popescu, C. Sen, E. Dagotto
The ferromagnetic (FM) transition temperature (Tc) of a two-band Double-Exchange (DE) model for colossal magnetoresistance (CMR) materials is studied using dynamical mean-field the…
Colossal Magnetoresistance Observed in Monte Carlo Simulations of the One- and Two-Orbital Models for Manganites
C. Şen, G. Alvarez, H. Aliaga +1
The one- and two-orbital double-exchange models for manganites are studied using Monte Carlo computational techniques in the presence of a robust electron-phonon coupling (but negl…