Eur. Phys. J. B 30, 9-15 (2002)
https://doi.org/10.1140/epjb/e2002-00352-1

Electronic structure and magnetic properties of correlated metals

A local self-consistent perturbation scheme

¹ University of Nijmegen, NL 6525 ED Nijmegen, The Netherlands
² Department of Physics, Uppsala University, Box 530, 751 21 Uppsala, Sweden
³ Institute of Metal Physics, 620219 Ekaterinburg, Russia

Corresponding author: ^a A.Lichtenstein@sci.kun.nl

Received: 25 April 2002
Revised: 26 August 2002
Published online: 19 November 2002

Abstract

In the framework of LDA+DMFT (dynamical mean field theory) approach for realistic electronic structure calculations, a new perturbation scheme which combines the T-matrix and fluctuating exchange approximations is presented. This method is less computationally expensive than the numerically exact quantum Monte Carlo technique and give an adequate description of the electronic structure and exchange interactions in magnetic metals. We present a simple expression for the exchange interactions corresponding to the neglect of the vertex, corrections which becomes exact for the spin-wave stiffness in the local approximation. Electronic structure, correlation effects and exchange interactions for ferromagnetic nickel are discussed.