%0 Journal Article
%T THE THEORETICAL STUDY OF DYNAMIC THERMAL EXPANSION OF Bi-BASED HIGH T_c SUPERCONDUCTORS<br>Bi系高Tc超导体动态热膨胀反常行为理论初探
%A CHEN Jinyu
%A GUO Jingdong
%A ZHOU Benlian
%A <br>陈金玉
%A 郭敬东
%A 周本濂
%J 材料研究学报
%D 1998
%I 
%X The dynamic process of thermal expansion of Bi-based high-Tc superconductors is studied theoretically. For normal and superconducting states, two groups of parameters are obtained to fit the experimental data, the agreement is good. Compared with the normal state, the anharmonic effects are greatly enhanced in the superconducting state. Both of the asymmtry of the mutual repulsion of the atoms and phonon softening are enhanced in the superconducting state, especially, the increase of the softening of phonons is much more enormous, up to 103 magnitude. In the end, the mechanism of the high-Tc Superconductors is discussed preliminarily.
%K dynamic process of thermal expansion
%K high-T_c superconductor
%K anharmonic effect
%K phonon softening
%K polaron<br>热膨胀
%K 动态过程
%K 超导体
%K 高Tc
%K 铋系
%K 超导电性
%U http://www.alljournals.cn/get_abstract_url.aspx?pcid=5B3AB970F71A803DEACDC0559115BFCF0A068CD97DD29835&cid=84529CA2B2E519AC&jid=C101C4C04993B4D94FCD8446E6CBEB3B&aid=0378B708624353958AA67713615A3FEA&yid=8CAA3A429E3EA654&vid=59906B3B2830C2C5&iid=0B39A22176CE99FB&sid=BA79719BCA7341D5&eid=F1177A9DF1349B63&journal_id=1005-3093&journal_name=材料研究学报&referenced_num=0&reference_num=4