Bowler, DR and Gillan, MJ (2002) An embedding scheme based on quantum linear-scaling methods. CHEM PHYS LETT , 355 (3-4) 306 - 310.
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We point out a close connection between linear-scaling electronic structure techniques and the embedding problem (treatment of a defect in an infinite perfect crystal), the key to the connection being the locality of the density matrix. We show how an existing linear-scaling technique can be turned into an embedding technique, which appears to have advantages over earlier methods, The effectiveness of the new technique is illustrated by practical tight-binding calculations on three systems: a substitutional impurity and the vacancy in silicon. and the Si (0 0 1) surface. We indicate the developments needed to perform embedding calculations by the new approach with first-principles density-functional theory (DFT). (C) 2002 Elsevier Science B.V. All rights reserved.
|Title:||An embedding scheme based on quantum linear-scaling methods|
|Keywords:||ELECTRONIC-STRUCTURE CALCULATIONS, DENSITY-MATRIX, SYSTEMS|
|UCL classification:||UCL > School of BEAMS > Faculty of Maths and Physical Sciences > London Centre for Nanotechnology|
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