资源描述：
《high-quality continuous random networksnew》由会员上传分享，免费在线阅读，更多相关内容在教育资源-天天文库。
1、High-qualitycontinuousrandomnetworksG.T.Barkema(a)TheoreticalPhysics,UtrechtUniversity,Princetonplein5,3584CCUtrecht,theNetherlandsNormandMousseau(b)DepartmentofPhysicsandAstronomyandCMSS,OhioUniversity,Athens,OH45701,USA(SubmittedtothePhysicalReviewB-Febru
2、ary1,2008)Thecontinuousrandomnetwork(CRN)modelisanidealizedmodelforperfectlycoordinatedamor-phoussemiconductors.ThequalityofaCRNcanbeassessedintermsoftopologicalandconfigura-tionalproperties,includingcoordination,bond-angledistributionsanddeformationenergy.U
3、singavariationonthesilliumapproachproposed14yearsagobyWooten,WinerandWeaire,wepresent1000-atomand4096-atomconfigurationswithadegreeofstrainsignificantlylessthanthebestCRNavailableatthemomentand,forthefirsttime,comparabletoexperimentalresults.PACSnumbers:61.43.
4、Dq,71.55.Jv61.20.JalightonthisdiscrepancyistotrytoseehowfaritispossibletopushthecontinuousrandommodelinorderI.INTRODUCTIONtoreachstructuralpropertiesinagreementwithexperi-ment.Bycreatingidealizednetworkswiththesamean-Thestructureofamorphoussemiconductors,as
5、seenbygulardeviationastheexperimentalonesandagoodover-theorists,iswellrepresentedbythecontinuousrandomallfittotheradialdistributionfunction,itispossibletonetwork(CRN)modelintroducedmorethan60yearsshowthatperfectcoordinationinamorphoussiliconisagobyZachariase
6、n[1].Theinterestofthismodelliesinnotruledoutbythelowangulardeviation.Thisistheitssimplicity:theonlyrequirementofthismodelisthatpurposeofthispaperwhichfollowsalongseriesofworkseachatomshouldsatisfyfullyitsbondingneeds.Inad-goinginthesamedirection[6–9].dition
7、,thequalityofaCRNisgenerallydeterminedbyUsingamodifiedversionoftheWooten-Winer-Weairetheamountofstrain,asmeasuredbythelocaldeviationsalgorithm,wehavesucceededincreatinganumberofto-fromcrystallineenvironment,inducedbythisconstraint;tallyindependent1000-atomco
8、nfigurationswithabond-the“ideal”CRNbeingtypicallydefinedasthatwiththeangledistributionaslowas9.19degrees,almost2de-lowestspreadinthebondlengthandbondangledistri-greesbelowthebestavailablenumericalmodelsw
