第51卷第1期2023年2月福州大学学报(自然科学版)JournalofFuzhouUniversity(NaturalScienceEdition)Vol.51No.1Feb.2023DOI:10.7631/issn.1000-2243.22009文章编号:1000-2243(2023)01-0020-07Bi2Se3纳米线的生长及其圆偏振光电流的研究李铭贵,崔广州,俞金玲(福州大学物理与信息工程学院,福建福州350108)摘要:采用化学气相沉积法制备拓扑绝缘体Bi2Se3纳米线.系统分析生长温度和气体流量对Bi2Se3纳米线的形貌、晶体质量的影响,并研究Bi2Se3纳米线的圆偏振光致电流.研究结果表明,Bi2Se3纳米线的最佳生长温度为530℃,气体流量为30mL·min-1.通过扫描电子显微镜、透射电子显微镜、拉曼等表征手段,表明所生长的Bi2Se3纳米线具有较高的质量.Bi2Se3纳米线的光电流随着四分之一波片的变化表明,Bi2Se3纳米线具有较强的自旋轨道耦合效应.圆偏振光致电流随入射角的增大而减小,这是因为Bi2Se3的对称性结构为C3V.相比Bi2Se3薄膜或者Bi2Se3纳米片,Bi2Se3纳米线具有更大的CPGE电流,这可能是因为纳米线具有更大的比表面积,可以避免表面态信号淹没在体态信号中.关键词:拓扑绝缘体;化学气相沉积法;Bi2Se3纳米线;圆偏振光致电流效应中图分类号:O472.3文献标识码:AGrowthandcircularphotogalvaniceffectinvestigationofBi2Se3nanowiresLIMinggui,CUIGuangzhou,YUJinling(CollegeofPhysicsandInformationEngineering,FuzhouUniversity,Fuzhou,Fujian350108,China)Abstract:Inthispaper,Bi2Se3nanowiresweregrownbychemicalvapordeposition.TheeffectsofgrowthtemperatureandgasflowrateonthemorphologyandcrystalqualityofBi2Se3nanowiresweresystematicallystudied,andtheBi2Se3nanowireswerefabricatedintoasinglenanowiredevicetostudythecircularphotogalvaniceffectofBi2Se3nanowire.Theresultsshowthattheoptimumgrowthcondi-tionsofBi2Se3nanowiresaretemperature530℃andgasflow30mL·min-1.Scanningelectronmicro-scope,transmissionelectronmicroscope,RamanspectraandothercharacterizationmethodsshowthatthegrownBi2Se3nanowireshavehighquality.ThedependenceofthephotocurrentinducedbythecircularphotogalvaniceffectoftheBi2Se3nanowireonincidentangleindicatesthatthesymmetricstructureofBi2Se3isC3V.ComparedwithBi2Se3thinfilmsorBi2Se3nanoplates,Bi2Se3nanowireshavelargerCPGEduetosignificantl...