Ca掺杂Nd_(1.85)Ce_(0.15)CuO_(4-δ)体系的输运性质研究  

STUDY OF THE TRANSPORT PROPERTIES IN Ca DOPING NdCeCuO SYSTEM

作　　者：阮可青[1,2] 陈仙辉[1,2] 冯宇[1,2] 汪成友[1,2] 曹烈兆[1,2] 贾云波[1] 

机构地区：[1]中国科学技术大学结构分析开放研究实验室 [2]中国科学技术大学物理系

出　　处：《物理学报》1997年第4期756-761,共6页Acta Physica Sinica

基　　金：高等学校博士学科点专项科研基金

摘　　要：为了研究Ｎｄ１８５Ｃｅ０１５ＣｕＯ４－δ体系中载流子的电荷性质，分别在Ｎｄ１８５Ｃｅ０１５ＣｕＯ４－δ中用Ｃａ２＋取代Ｎｄ３＋制备了Ｎｄ１８５－ｘＣｅ０１５ＣａｘＣｕＯ４－δ样品，在Ｎｄ２ＣｕＯ４－δ中用Ｃａ掺杂制备了Ｎｄ２－ｘＣａｘＣｕＯ４－δ样品，并对上述样品进行了详细的输运性质研究．随着Ｃａ含量的增加，样品的霍耳系数ＲＨ发生了由负向正的转变，Ｃａ掺杂引起晶格畸变。In order to investigate the nature of the charge carriers in NdCeCuO system, we prepared Nd 1 85- x Ce 0 15 Ca x CuO 4- δ and Nd 2- x Ca x CuO 4-δ , and studied transport properties of them. With increasing Ca concentration, the sign of Hall coefficient is changed from negative to positive. The hole state in CuO 2 plane arises from the lattice distortion induced by Ca doping, which leads to the O2p band pass through the Fermi level.

关 键 词：电子型 超导体 钙掺杂 输运性质 

分 类 号：O511.1[理学—低温物理]