TlBaCaCuO外延膜的光响应(英文)  

PHOTORESPONSE OF EPITAXIAL THIN FILMS OF TlBaCaCuO

作　　者：AbbasA.Essa 夏荣明[1] 徐克西[1] 周世平 鲍家善[1] 阎少林[2] 方兰 

机构地区：[1]上海大学物理系 [2]南开大学电子科学系

出　　处：《低温物理学报》1998年第4期276-282,共7页Low Temperature Physical Letters

摘　　要：在波长λ＝６３２．８ｎｍ，入射功率约０．８ｍＷ的ＨｅＮｅ激光照射下，对ＴｌＢａ２Ｃａ２ＣｕＯ２（Ｔｌ２２１２）外延膜的光响应行为进行了实验研究．结果显示：在样品转变温度（Ｔｃ＝１０５．５Ｋ）附近，ＴｌＢａＣａＣｕＯ外延膜的光响应行为表现为辐射热与非辐射热效应共存现象．光响应信号电平与样品温度、偏置电流、及入射光束的调制频率等诸因素有密切关系的关系．实验结果还表明，辐射热与非辐射热效应的响应行为是不同的．Abstract The result of the experimental measurement of photoresponse in epitaxial films of c axis oriented TlBa 2Ca 2CuO 2 (Tl 2212) at wavelengths 632.8nm were presented. A systematic analysis of the measurement performed in superconducting state indicates the photoresponse associated with equilibrium and nonequilibrium response. The magnitude of the photoresponse of TlBaCaCuO depends strongly on temperature,bias current,and modulating frequency. The temperature dependence of the photoresponse indicates a difference betwwen the equilibrium(bolometric) and the nonequilibrium(nonbolometric) component′s behavior.

关 键 词：光响应 TBCCO 超导膜 外延膜 

分 类 号：TM262.014[一般工业技术—材料科学与工程]