RefDoc
Haut

Faire une nouvelle recherche
Make a new search
Lancer la recherche


Titre du document / Document title

Order-N tight-binding methods for electronic-structure and molecular dynamics

Auteur(s) / Author(s)

ORDEJON P. (1) ;

Affiliation(s) du ou des auteurs / Author(s) Affiliation(s)

(1) Departamento de Física, Universidad de Oviedo, 33007 Oviedo, ESPAGNE

Résumé / Abstract

During the last few years, there has been an intense effort in the development of the so-called Order-N methods to solve the electronic-structure problem, for which the numerical efforts scale only linearly with the size of the system. The combination of these algorithms with total energy schemes has expanded our capability of performing electronic-structure based molecular dynamics (MD) simulations for systems of unprecedented size. In general. Order-N methods yield approximate solutions, based on physically motivated approximations. The central idea is, in most cases, the concept of localization (or the dependence of the relevant physical quantities on only the local environment). Therefore, the Tight-Binding (TB) formulation (or, more generally, the use of some kind of localized basis set), either from first principles or in an empirical form, is a natural framework to develop and apply Order-N schemes. In this paper we analyze the main ideas involved in these methods and their different implementations. We will focus on schemes to compute total energies and forces, therefore suited for MD simulations, and also on approaches to study the spectral properties like the density of states and eigenvalue information. These two classes of methods provided valuable complementary information and are often based on very similar assumptions and formalisms.

Revue / Journal Title

Computational materials science    ISSN  0927-0256 

Source / Source

1998, vol. 12, no 3 (135 p.)  (128 ref.), pp. 157-191

Langue / Language

Anglais

Editeur / Publisher

Elsevier, Amsterdam, PAYS-BAS  (1992) (Revue)

Mots-clés anglais / English Keywords

Reviews

;

Electronic structure

;

Molecular dynamics calculations

;

Tight binding approximation

;

Total energy

;

Electronic density of states

;

Variational methods

;

Projection method

;

Spectral method

;

Mots-clés français / French Keywords

Article synthèse

;

Structure électronique

;

Calcul dynamique moléculaire

;

Approximation liaison forte

;

Energie totale

;

Densité état électron

;

Méthode variationnelle

;

Méthode projection

;

Méthode spectrale

;

Mots-clés espagnols / Spanish Keywords

Energía total

;

Método proyección

;

Método espectral

;

Localisation / Location

INIST-CNRS, Cote INIST : 26032, 35400007339097.0010

Nº notice refdoc (ud4) : 1640567



Faire une nouvelle recherche
Make a new search
Lancer la recherche
Bas