高分辨差分比热测量方法及在高温超导体研究中的应用  

High-resolution differential specific heat measurement and its application to high Tc cuprates

作　　者：雒建林[1] 郑萍[1] 

机构地区：[1]中国科学院物理研究所,北京100190

出　　处：《物理》2011年第2期116-120,共5页Physics

基　　金：国家自然科学基金(批准号:11025422);国家重点基础研究发展计划(批准号:2011CB921700)资助项目

摘　　要：差分比热实验方法是测量两个样品的比热差,具有高达万分之一的比热测量分辨率,适合测量相变时微小的比热变化及宽温区的电子比热.文章介绍了高分辨连续升温差分比热实验的测量原理和测量方法,并以铜氧化物高温超导体Y0.8Ca0.2Ba2Cu3O6+x为例,介绍了差分比热实验手段在宽温区电子比热的获得、正常态赝能隙及超导凝聚能研究等方面的应用.Differential specific heat measurement detects the difference in specific heat between two samples. The system has an extremely high resolution greater than 10-4,and is suitable for measuring a tiny change in specific heat when a material experiences a phase transition,or for measuring electronic specific heat over a wide temperature range. In this paper,we describe the principle and method of high-resolution continuous heating differential specific heat measurement. In addition,we introduce its application in the studies of electronic specific heat,normal state pseudo-gaps,and superconducting condensed energy in high Tc cuprates.

关 键 词：高分辨差分比热测量 电子比热 高温超导体 

分 类 号：O511[理学—低温物理]