Non-Periodic Finite-Element Formulation of Orbital-Free Density Functional Theory
Abstract
We propose an approach to perform orbital-free density functional theory calculations in anon-periodic setting using the finite-element method. We consider this a step towards constructing a seamless multi-scale approach for studying defects like vacancies, dislocationsand cracks that require quantum mechanical resolution at the core and are sensitive to longrange continuum stresses. In this paper, we describe a local real space variational formulation for orbital-free density functional theory, including the electrostatic terms and proveexistence results. We prove the convergence of the finite-element approximation includingnumerical quadratures for our variational formulation. Finally, we demonstrate our methodusing examples.
Document Details
- Document Type
- Technical Report
- Publication Date
- Sep 13, 2006
- Accession Number
- AD1132660
Entities
People
- Jaroslaw Knap
- Kaushik Bhattacharya
- Michael Ortiz
- Vikram Gavini
Organizations
- California Institute of Technology