Issue |
EPL
Volume 112, Number 1, October 2015
|
|
---|---|---|
Article Number | 17001 | |
Number of page(s) | 7 | |
Section | Condensed Matter: Electronic Structure, Electrical, Magnetic and Optical Properties | |
DOI | https://doi.org/10.1209/0295-5075/112/17001 | |
Published online | 07 October 2015 |
State-of-the-art techniques for calculating spectral functions in models for correlated materials
Centro Atómico Bariloche and Instituto Balseiro, CNEA and CONICET - 8400 Bariloche, Argentina
Received: 10 July 2015
Accepted: 21 September 2015
The dynamical mean-field theory (DMFT) has become a standard technique for the study of strongly correlated models and materials overcoming some of the limitations of density functional approaches based on local approximations. An important step in this method involves the calculation of response functions of a multiorbital impurity problem which is related to the original model. Recently there has been considerable progress in the development of techniques based on the density matrix renormalization group (DMRG) and related matrix product states (MPS) implying a substantial improvement to previous methods. In this paper we review some of the standard algorithms and compare them to the newly developed techniques, showing examples for the particular case of the half-filled two-band Hubbard model.
PACS: 71.15.-m – Methods of electronic structure calculations / 71.27.+a – Strongly correlated electron systems; heavy fermions / 75.40.Mg – Numerical simulation studies
© EPLA, 2015
Current usage metrics show cumulative count of Article Views (full-text article views including HTML views, PDF and ePub downloads, according to the available data) and Abstracts Views on Vision4Press platform.
Data correspond to usage on the plateform after 2015. The current usage metrics is available 48-96 hours after online publication and is updated daily on week days.
Initial download of the metrics may take a while.