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Effective hamiltonian approach and the lattice fixed node approximation
Sandro Sorella, Seiji Yunoki
We define a numerical scheme that allows to approximate a given Hamiltonian by an effective one, by requiring several constraints determined by exact properties of generic ''short…
Electron-hole asymmetry in magnetic properties of lightly doped high- superconductors: a quantum Monte Carlo study
S. Yunoki, S. Sorella
Using a recently developed variational quantum Monte Carlo method, magnetic properties of high- superconductors are studied at zero temperature (), by numerical simul…
Resonating valence bond wave function for the two dimensional fractional spin liquid
S. Yunoki, S. Sorella
The unconventional low-lying spin excitations, recently observed in neutron scattering experiments on , are explained with a spin liquid wave function. The disp…
Theoretical Study of Half-Doped Models for Manganites: Fragility of the CE Phase with Disorder, Two Types of Colossal Magnetoresistances, and Charge-Ordered States for Electron-Doped Materials
H. Aliaga, D. Magnoux, A. Moreo +3
A comprehensive analysis of half-doped manganites is presented using Monte Carlo simulations applied to the double-exchange model with cooperative Jahn-Teller lattice distortions i…