摘要
TheangledependenceofopticalphononmodesofanAlNbulksinglecrystalfromthem-plane(1100)andc-plane(0001)surfaces,respectively,isinvestigatedbypolarizedRamanspectroscopyinabackscatteringconfigurationatroomtemperature.CorrespondingRamanselectionrulesarederivedaccordingtomeasuredscatteringgeometriestoillustratetheangledependence.Theangle-dependentintensitiesofphononmodesarediscussedandcomparedtotheoreticalscatteringintensities,yieldingtheRamantensorelementsofA1(TO),E22,E1(TO),andA1(LO)phononmodesandtherelativephasedifferencebetweenthetwocomplexelementsofA1(TO).Furthermore,theRamantensorofwurtziteAlNiscomparedwiththatofwurtziteZnOreportedinpreviouswork,revealingtheintrinsicdifferencesoflatticevibrationdynamicsbetweenAlNandZnO.
出版日期
2015年02月12日(中国Betway体育网页登陆平台首次上网日期,不代表论文的发表时间)