Physics – Condensed Matter – Strongly Correlated Electrons
Scientific paper
2005-02-10
Recent Research Developments in Quantum Chemistry 3 (2002) 143
Physics
Condensed Matter
Strongly Correlated Electrons
Scientific paper
The present paper reviews recent achievements on the ab initio determination of effective model Hamiltonians aimed at the description of strongly correlated materials. These models (Heisenberg, $t-J$, extended Hubbard, Kondo, etc) are crucial to solid state physicists for the description and understanding of the electronic remarkable properties such as magnetic orders, photo-induced magnetism, transport properties, high $t\_c$ super conductivity, etc. We will see how the association and the control of embedding techniques, fragment spectroscopy, effective or intermediate Hamiltonian theories, provides a systematic and well controlled method for the determination of trustworthy models Hamiltonians.
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