Density Functional Theory Study on the Structural and Electronic Properties of Ge(SiO_2)_n Clusters.pdfVIP
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Density Functional Theory Study on the Structural and Electronic Properties of Ge(SiO_2)_n Clusters.pdf
3O卷 6期 结 构 化 学 (J疆G0 战 殷 ) Vo1.30,No.6
2Ol1.6 Chinese Struct, Chem. 913~919
DensityFunctionalTheoryStudy
ontheStructuralandElectronic
PropertiesofGe(SiO2)Clusters①
GEGuiXiana~ YANHong.Xiaa JINGQun ZHOULong。
CAOHai.Bin。 ZHANGJian.Jun
。(KeyLaboratoryofEcophysicsandDepartmentofPhysics,
SchoolofScience,ShiheziUniversity,Xinjiang832003,China)
ABSTRACT Thegeometry,stability,bindingenergyandelectronicpropertiesof(SiO2)and
Ge(SiO2)nclusters 7)havebeeninvestigatedbyDensityfunctionaltheory(DFT).Theresults
showthatthelowesteneryg structuresofGe(SiO2)areobtainedbyaddingoneGeontheendsite
oftheO atomortheSineraendsiteoftheO atom in (SiO2).ThechemicalactivationofGe.
(SiO2)isimprovedcomparedwiht (SiO2)n.Tllecalculatedsecond-orderdifferenceofenergiesand
rfagmenattionenergiesshowthathteGe(Si02)Hclusterswihtn=2or5raestable.
Keywords:(Si02),landGe(SiO2)clusters,geometries,electronicproperties
PACC:3640.3640B
l INTRoDUCTIoN nadofundhtathtemixedstructuresbetweenwtonad
three rings rae specially stable nad spirounion
Siliconoxideisoneofthemostabundnatmaterials structurewhichmaybethestructureofnonalineni 0.4
onearth.Especially,silicahasawiderangeofappli- nnldiameterismoresatblehtanhtelniera nadtwin.
cationsni microelectronics,opticalcommun ication, rnig structures[131
. The structuresna delectronicpro.
andthin—film technoloyg .So,niterestinstudying
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