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THEORY OF DEFECTS IN CONDUCTING POLYMERS .1. THEORETICAL PRINCIPLES AND SIMPLE APPLICATIONS

WALLACE, DS; STONEHAM, AM; HAYES, W; FISHER, AJ; HARKER, AH; (1991) THEORY OF DEFECTS IN CONDUCTING POLYMERS .1. THEORETICAL PRINCIPLES AND SIMPLE APPLICATIONS. J PHYS-CONDENS MAT , 3 (22) 3879 - 3903. 10.1088/0953-8984/3/22/002. Green open access

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Abstract

We describe a method for solving simultaneously the Hartree-Fock equations of motion in the zero differential overlap approximation for the electronic structure of a molecule and the dynamical equations of motion for its atoms. Our approach is similar to that of Car and Parrinello in that we optimize the electronic structure and the geometry simultaneously, but differs in that we make a chosen number of iterations towards electronic self-consistency at each geometry rather than treating the electron wavefunctions as dynamical variables. We give examples of the use of the method to calculate the equilibrium geometries, dipole moments, molecular polarizabilities and vibrational frequencies of small molecules. In the following paper we apply this approach to problems of defect processes in conducting polymers.

Type: Article
Title: THEORY OF DEFECTS IN CONDUCTING POLYMERS .1. THEORETICAL PRINCIPLES AND SIMPLE APPLICATIONS
Open access status: An open access version is available from UCL Discovery
DOI: 10.1088/0953-8984/3/22/002
Publisher version: http://dx.doi.org/10.1088/0953-8984/3/22/002
Language: English
Additional information: Text made available to UCL Discovery by kind permission of IOP Publishing, 2012
Keywords: ABINITIO MOLECULAR-DYNAMICS, ELECTRONIC-PROPERTIES, CONSTANTS, ENERGY
UCL classification: UCL > School of BEAMS > Faculty of Maths and Physical Sciences
UCL > School of BEAMS > Faculty of Maths and Physical Sciences > London Centre for Nanotechnology
UCL > School of BEAMS > Faculty of Maths and Physical Sciences > Physics and Astronomy
URI: http://discovery.ucl.ac.uk/id/eprint/162607
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