超导物理 第一讲 讲义.ppt

* * * * * * * * * * * * * * * * * * * Discovery of HTSC Background Theory: Little, Ginzberg, … Experiments: Oxides, the ceramic superconductors Ba(Pb,Bi)O3; LixTi2O4 (La,Ba)2CuO4 2008-9-11 * Discovery of HTSC Bednorz and Muller, Z. Physik B64, 189, (1986) 2008-9-11 * Discovery of HTSC for their important break-through in the discovery of superconductivity in ceramic materials K. Alexander Muller J. Georg Bednorz 1987 Nobel Prize for Physics 2008-9-11 * Retrospection on the Discovery of HTSC (La,Ba)2CuO4: A French Group (B. Raveau) A Russian Group Pioneer Proposal on Oxide Superconductor in China: Ba(Pb,Bi)O3 New discovery and its impact on Science Technology 2008-9-11 * Common structure model of HTSC 2008-9-11 * 2008-9-11 * Electronic Phase Diagram of HTSC 2008-9-11 * Superconducting Gap Functions (0,?) (?,0) (?/2,?/2) s-wave gap d-wave gap 2008-9-11 * 赝能隙现象与预超导配对 传统超导体 Cooper对的出现与建立相干性同步完成. 一般单电子 高温超导体 Tc 一般单电子 Cooper Pairs Bose-Einstein Condensation T* Tc 涨落的Cooper对 相干的Cooper对： BEC 2008-9-11 * 2008-9-11 * Is average field theory enough to elucidate HTSC? Nanoscale phase separations: key to the high-Tc? The Role of Quenched Disorder? 2008-9-11 * * New High-Tc Superconductors LaFeAsO, 1111, 56 K BaFe2As2, 122, 38 K * * 111, LiFeAs, 18 K 11, FeSe, 10 K * Building Blocks Mechanism of HTSC? 揭示高温超导机理 = 诺贝尔物理学奖 发现室温超导体= 诺贝尔物理学奖 2008-9-11 * Nobel Prizes mark MILESTONES in the area of SUPERCONDUCTIVITY 1911 Discovery of superconductivity 1950-1957: GLAG Theory 1957 BCS Theory 1962 Josephson Effect 1986 A. Müller and G. Bednorz: discovery of HTSC ???? 2008-9-11 * 思考题、调研题与习题 1. 论述理想导体与超导体之差别。 2. 目前为止，超导现象出现在哪些系统中？你认为未来的“新超导体”可能在哪些系统中被发现？ 3. 超导研究的里程碑式的工作有哪些？ 4. 调研“关于超导的应用”。 * 2008-9-11 * * * * * * * * * * * * * * Overview of Superconductivity “超导物理”第一讲 浙江大学凝聚态物理研究所CGH 课程介绍 参考书: 张裕恒：《超导物理》，中国科技大学出版社 章立源等：《超导物理学》，电子工业出版社 张其瑞：《高温超导电性》，浙江大学出版社 M. Tinkham: “Introduction to Superconductivity”, McGraw-Hill, Inc. 考试等： 2008-9-11 * Outline Disc