横向交、直流电流对蓝青铜K_(0.3)MoO_3的I-V特性的调制效应  

Modulation effect of transverse alternating and direct currents on I-V characteristics in blue bronze K_(0.3)MoO_3

作　　者：郑毅[1] 沈静琴[1] 陈学枝[1] 王洪涛[2] 许祝安[1] 张宣嘉[1] 

机构地区：[1]浙江大学物理系,杭州310027 [2]温州师范学院物理与电子信息科学系,温州325027

出　　处：《物理学报》2004年第4期1182-1185,共4页Acta Physica Sinica

基　　金：国家自然科学基金 (批准号 :1 990 4 0 0 9;1 0 2 2 541 7)资助的课题~~

摘　　要：通过I V特性测量 ,研究了横向交、直流电流对蓝青铜K0 3 MoO3 中电荷密度波 (CDW )动力学行为的影响 .实验结果表明 ,无论是直流还是交流 ,随着横向调制电流的增大 ,CDW滑移的阈值电场均会相应地减小 ;但横向交流电流的调制效应较小 ,可能更接近本征的效应 .We have investigated the transverse alternating and direct current effect on the charge_density wave (CDW) dynamical properties in K 0 3 MoO 3 by measurin g I-V characteristics.The results show that,no matter whether DC or AC tran sverse current is used,the CDW depinning field (E t) along the longitudinal direction is effectively suppressed as the transverse current increases.But the effect of AC current on I_V characteristics is weaker,and probably closer t o the intrinsic effect.A frequency dependence of transverse AC modulation effect was observed.

关 键 词：横向电流调制效应 电荷密度波 钼酸钾晶体 蓝青铜 调制效应 

分 类 号：O441[理学—电磁学]