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We review the dynamical mean-field theory of strongly correlated electron systems which is based on a mapping of lattice models onto quantum impurity models subject to a self-consistency condition. This mapping is exact for models of correlated electrons in the limit of large lattice coordination (or infinite spatial dimensions). It extends the standard… (More)

A review of the basic ideas and techniques of the spectral density-functional theory is presented. This method is currently used for electronic structure calculations of strongly correlated materials where the one-electron description breaks down. The method is illustrated with several examples where interactions play a dominant role: systems near… (More)

The multichannel Kondo model with SU(N) spin symmetry and SU(K) channel symmetry is considered. The impurity spin is chosen to transform as an antisymmetric representation of SU(N), corresponding to a fixed number of Abrikosov fermions ∑ α f † αfα = Q. For more than one channel (K > 1), and all values of N and Q, the model displays non-Fermi behaviour… (More)

F. Aryasetiawan,1 M. Imada,2,3 A. Georges,4,5 G. Kotliar,6 S. Biermann,4 and A. I. Lichtenstein7 1Research Institute for Computational Sciences, AIST, 1-1-1 Umezono, Tsukuba Central 2, Ibaraki 305-8568, Japan 2Institute for Solid State Physics, University of Tokyo, Kashiwacha, Kashiwa, Chiba 277-8581, Japan 3PRESTO, Japan Science and Technology Agency,… (More)

The iron pnictide and chalcogenide compounds are a subject of intensive investigations owing to their surprisingly high temperature superconductivity. They all share the same basic building blocks, but there is significant variation in their physical properties, such as magnetic ordered moments, effective masses, superconducting gaps and transition… (More)

We compute the electronic structure, momentum resolved spectral function and optical conductivity of the new superconductor LaO1-xFxFeAs within the combination of the density functional theory and dynamical mean field theory. We find that the compound in the normal state is a strongly correlated metal and the parent compound is a bad metal at the verge of… (More)

Complex electronic matter shows subtle forms of selforganization, which are almost invisible to the available experimental tools. One prominent example is provided by the heavy-fermion material URu2Si2. At high temperature, the 5f electrons of uranium carry a very large entropy. This entropy is released at 17.5 K by means of a second-order phase transition1… (More)

Although the nuclear properties of the late actinides (plutonium, americium and curium) are fully understood and widely applied to energy generation, their solid-state properties do not fit within standard models and are the subject of active research. Plutonium displays phases with enormous volume differences, and both its Pauli-like magnetic… (More)

Dynamical mean field theory (DMFT) has been very successful in describing many aspects of strongly correlated electron systems [1], and presently much effort is being put into implementing it for realistic calculations of material properties of solids [2]. This method is exact in the limit of infinite lattice coordination [3] and describes correctly local… (More)

- A I Lichtenstein, M I Katsnelson, G Kotliar
- Physical review letters
- 2001

We present an ab initio quantum theory of the finite-temperature magnetism of iron and nickel. A recently developed technique which combines dynamical mean-field theory with realistic electronic structure methods successfully describes the many-body features of the one electron spectra and the observed magnetic moments below and above the Curie temperature.