Title
Bond stretching and electronic correlation in relation to mechanical and tribological properties of solids Bond stretching and electronic correlation in relation to mechanical and tribological properties of solids
Author
Publication type
article
Publication
New york :John wiley & sons inc ,
Subject
Mathematics
Physics
Chemistry
Source (journal)
International journal of quantum chemistry. - New York, N.Y.
Source (book)
3rd Congress of the International Society for Theoretical Chemical, Physics (ISTCP), NOV 08-13, 1999, UNIV NACL AUTONOMA MEXICO, MEXICO CITY, MEXICO
Volume/pages
80(2000) :2 , p. 193-200
ISSN
0020-7608
ISI
000089460100012
Carrier
E
Target language
English (eng)
Full text (Publishers DOI)
Abstract
The cleavage force F(z) as a function of the additional separation z from equilibrium planar spacing can be usefully discussed in three regimes: (i) the Hooke law region F(z) = Az for small z, (ii) near its maximum, and (iii) the large z limit. Region (i) can be tackled by phonon theory, with appropriate inclusion of electron exchange and correlation interactions. Regime (iii), where F(z) = az(-3), is characterized by the electronic plasma frequency, which in turn embodies long-range electron-electron correlations, in a metal or in a semiconductor such as Si. Here, special attention will be focused on region (ii) for Si and its relation to bond-breaking and electron correlation. The connection between cleavage force F(z) and surface energy is also emphasized. Electronic properties for noble and transition metals such as Cu and Fe can often be usefully subsumed into so-called glue models of many-body-force fields. Use of such force fields will be illustrated by reference to mechanical and tribological properties of Fe, with some attention again given to surface energies, which in turn correlate with point defect properties in a metal like Cu. Finally, bond-breaking models are invoked to discuss extended defects, and in particular a solitary wave equation is exhibited that can embrace the emission of phonons by a propagating screw dislocation. (C) 2000 John Wiley & Sons, Inc.
E-info
http://gateway.webofknowledge.com/gateway/Gateway.cgi?GWVersion=2&SrcApp=PARTNER_APP&SrcAuth=LinksAMR&KeyUT=WOS:000089460100012&DestLinkType=RelatedRecords&DestApp=ALL_WOS&UsrCustomerID=ef845e08c439e550330acc77c7d2d848
http://gateway.webofknowledge.com/gateway/Gateway.cgi?GWVersion=2&SrcApp=PARTNER_APP&SrcAuth=LinksAMR&KeyUT=WOS:000089460100012&DestLinkType=FullRecord&DestApp=ALL_WOS&UsrCustomerID=ef845e08c439e550330acc77c7d2d848
http://gateway.webofknowledge.com/gateway/Gateway.cgi?GWVersion=2&SrcApp=PARTNER_APP&SrcAuth=LinksAMR&KeyUT=WOS:000089460100012&DestLinkType=CitingArticles&DestApp=ALL_WOS&UsrCustomerID=ef845e08c439e550330acc77c7d2d848