Search Results for aryasetiawan

... a method for going beyond DMFT to take into account dynamic long-range correlations by means of many-body perturbation theory. A highly successful many-body perturbation theory is the GW approximation (GWA) ( Hedin, 1965 ; Hedin and Lundqvist, 1969; Aryasetiawan and Gunnarsson, 1998 ; and Onida...

... and the LDA but it does not yield much improvement in the exchange splitting nor does it reproduce the well-known 6 eV satellite ( Aryasetiawan, 1992 ). The performance of the GWA on nickel reveals a number of limitations, which have turned out to be quite general. One of the most serious shortcomings...

... as a function of temperature and pressure (right: from Lefebvre et al. , 2000 . Copyright 2000 American Physical Society.). References References Anisimov , V. I. , Aryasetiawan , F. , and Lichtenstein , A. I. , “ First-principles calculations of the electronic structure and spectra...

.... ( 6.8 ) can be derived for the Green function ( Aryasetiawan et al. , 2009 ). From the Fourier transform of the equation of motion of the Green function, we have (6.9) [ ω − h − Σ ( ω ) ] G ( ω ) = 1 , where h is the one-particle Hamiltonian containing...

... is that the effective interaction among the electrons residing in the model subspace must be such that when it is screened by the electrons in the model, it should coincide with the fully screened interaction of the real system ( Aryasetiawan et al., 2004 ). The Constrained RPA The first step in constructing...

... Almbladh , C.-O. , von Barth , U. , and van Leeuwen , R. , “ Variational total energies from Φ- and Ψ-derivable theories ,” Int. J. Modern Phys. B   13 , 535 ( 1999 ). 10.1142/S0217979299000436 Amadon , B. , Biermann , S. , Georges , A. , and Aryasetiawan , F...

...   94 , 241110 ( 2016 ). 10.1103/PhysRevB.94.241110 Boehnke , L. , Nilsson , F. , Aryasetiawan , F. , and Werner , P. , “ When strong correlations become weak: Consistent merging of GW and DMFT ,” Phys. Rev. B   94 , 201106 ( 2016 ). 10.1103/PhysRevB.94.201106...

...References References Aryasetiawan , F. , “ Effective electron-electron interaction in many-electron systems ,” in DMFT: From Infinite Dimensions to Real Materials , edited by Pavarini , A. L. E. , Koch , E. , and Vollhardt , D. ( Verlag des Forschungszentrum Jülich , 2018...

...References References Almbladh , C.-O. and Hedin , L. , Beyond the One-Electron Model. Many-Body Effects in Atoms, Molecules, and Solids (North-Holland, 1983 ), Vol. 1b, pp. 607 – 904 , ISBN: 0444867104 . Aryasetiawan , F. , “ Self-energy of ferromagnetic nickel...