物理研磨致表面与界面对ZnTe高压原位结构和电输运性质的影响  

Effects of Grinding-induced Surface and Interface in Situ Structure and the Electrical Transportation Properties of ZnTe High Pressure

作　　者：费德厚[1] 刘春明 周晓雪 马新军 FEI De-hou LIU Chun-ming ZHOU Xiao-xue MA Xin-jun(Institute of Atomic and Molecular Physics, Jilin University, Changchun 130012, China College of Physics and Electronics Information, Inner Mongolia University for Nationalities, Tongliao 028043, China)

机构地区：[1]吉林大学原子与分子物理研究所,吉林长春130012 [2]内蒙古民族大学物理与电子信息学院,内蒙古通辽028043

出　　处：《内蒙古民族大学学报（自然科学版）》2017年第3期185-189,共5页Journal of Inner Mongolia Minzu University：Natural Sciences

基　　金：国家自然科学基金青年基金资助项目(11404133);吉林省科技厅青年基金资助项目(20140520105JH)

摘　　要：界面与尺度效应会影响材料的压致结构相转变和电输运特性.通过化学合成方法可以获得不同尺寸的材料,它们具有不同的压致结构相转变和电输运特性.与化学合成方法不同,物理研磨方法得到的小尺寸材料会有更多的表面缺陷,导致材料表面能和内聚能的不同,它们在压力作用下的结构和电输运特性未知.本文以ZnTe样品为例,利用高压原位交流阻抗谱和直流电阻率测量方法对利用物理研磨方法得到的晶粒尺寸分别为170nm和410nm的样品进行了测量,实验最大压力为20GPa.结果分析发现:物理研磨得到的ZnTe样品的尺寸和界面效应对其压致相转变压力和宏观电输运性质均有显著的影响.Interface and scale effects can affect both the structural phase transitions and the electrical transportation properties of materials. Materials with different size can be obtained by chemical synthesis. They have different pressure-induced structural phase transitions and electrical transport properties under compression. Different from chemical synthesis methods,the small scale material obtained by physical grinding method will have more surface and interface defects,resulting in different material surface energy and intrinsic energy,their structure and electrical transportation properties are unknown under pressure. In this paper,using high pressure in situ alternating current impedance spectrum and direct current resistivity measurements,170 nm and 410 nm sized Zn Se particles were obtained by physical grinding. The maximum pressure was 20 GPa. It was found that the size and interface effect of ZnTe sample obtained by physical grinding has a significant influence on the pressure-induced phase transformation pressure and electrical transportation properties.

关 键 词：高压 物理研磨 表面与界面 电输运 

分 类 号：O469[理学—凝聚态物理]