简介:Wepresentnumericalcalculationoftheimpactofelectron-electroninteractiononthebehaviorofdensityofstatesandopticalpropertiesofBeO,SiCandBoron-Nitridenanotubesandsheets.Hubbardmodelhamiltonianisappliedtodescribethedynamicsofelectronsonthelatticestructureofthesescompounds.TheexcitationspectrumofthesysteminthepresenceoflocalelectronicinteractionshasbeenfoundusingmeanSeldapproach.WefindthebandgapwidthinbothopticalabsorptionanddensityofstatesreduceswithlocalHubbardelectronicinteractionparameter.Theabsorptionspectraexhibitstheremarkablepeaks,mainlyowingtothedivergencebehaviorofdensityofstatesandexcitoniceffects.AlsowecompareopticalabsorptionfrequencybehaviorofBeO,SiCandBoron-Nitridenanotubeswitheachother.FurthermoreweinvestigatetheopticalpropertiesofBeOandSiCsheets.Anovelfeatureofopticalconductivityofthesestructuresisthedecreaseoffrequencygapintheopticalspectrumduetoelectronicinteraction.