资源描述：
《Thermal transport in phononic crystals and the observation of coherent phonon scattering at room temperature》由会员上传分享，免费在线阅读，更多相关内容在学术论文-天天文库。
1、ARTICLEReceived30Jun2014
2、Accepted20Apr2015
3、Published24Jun2015DOI:10.1038/ncomms8228ThermaltransportinphononiccrystalsandtheobservationofcoherentphononscatteringatroomtemperatureSeyedhamidrezaAlaie1,2,3,*,DrewF.Goettler1,2,*,MehmetSu1,2,ZaydC.Leseman1,2,4,5,CharlesM.Reinke1
4、,5&IhabEl-Kady1,4,5Largereductionsinthethermalconductivityofthinsiliconmembraneshavebeendemon-stratedinvariousporousstructures.However,theroleofcoherentboundaryscatteringinsuchstructureshasbecomeamatterofsomedebate.Herewereportonthefirstexperi-mentalobservationofcoherentpho
5、nonboundaryscatteringatroomtemperaturein2Dphononiccrystalsformedbytheintroductionofairholesinasiliconmatrixwithminimumfeaturesizes4100nm.Todelaminateincoherentfromcoherentboundaryscattering,phononiccrystalswithafixedminimumfeaturesize,differingonlyinunitcellgeometry,werefab
6、ricated.Asuspendedislandtechniquewasusedtomeasurethethermalconductivity.Weintroduceahybridthermalconductivitymodelthataccountsforpartiallycoherentandpartiallyincoherentphononboundaryscattering.Weobserveexcellentagreementbetweenthismodelandexperimentaldata,andtheresultssugg
7、estthatsignificantroomtemperaturecoherentphononboundaryscatteringoccurs.1DepartmentofMechanicalEngineering,UniversityofNewMexico,Albuquerque,NewMexico87131,USA.2ManufacturingTrainingandTechnologyCenter,UniversityofNewMexico,Albuquerque,NewMexico87131,USA.3DeptartmentofPhysi
8、csandAstronomy,UniversityofNewMexico,Albuquerque,NewMexico87131,USA.4DepartmentofElectricalandComputerEngineering,UniversityofNewMexico,Albuquerque,NewMexico87131,USA.5DeptartmentofAppliedPhotonicMicrosystems,SandiaNationalLaboratories,Albuquerque,NewMexico87185,USA.*These
9、authorscontributedequallytothiswork.CorrespondenceandrequestsformaterialsshouldbeaddressedtoI.E.-K.(email:ielkady@sandia.gov).NATURECOMMUNICATIONS
10、6:7228
11、DOI:10.1038/ncomms8228
12、www.nature.com/naturecommunications1&2015MacmillanPublishersLimited.Allrightsreserved.ARTICLENAT
13、URECOMMUNICATIONS
14、DOI:10.1038/ncomms8228lmostallphysicalprocessesproduceheatasabyproduct,
