Speaker: 宋灿立 (清华大学物理系)

Time: April 13, 2022 09:00

Place: 理科楼C302

报告摘要：The structural complexity of copper-oxide-based superconductors has long puzzled scientists seeking to understand the microscopic mechanism of high-temperature superconductivity. This talk will focus on our five-year experimental efforts on atomic-scale preparation and direct spectroscopy of the structurally simplest infinite-layer cuprate films by combining the strengths of ozone-assisted molecular beam epitaxy and cryogenic scanning tunneling microscopy. We access the quintessential CuO₂ planes with ambipolar doping, reveal robust fundamental Mott-Hubbard bands against doping and evidence for nodeless gap function. These results, together with our experimental observations of lattice vibrational modes and percolative superconductivity on CuO₂, might provide new insights into the cuprate superconductors.

报告人简介：宋灿立，清华大学物理系长聘副教授，长期从事实验凝聚态物理研究，主要关注高温超导、拓扑绝缘体、拓扑超导体等量子薄膜材料和异质结的分子束外延制备、调控和扫描隧道显微学研究。2011年于清华大学物理系获得凝聚态物理专业理学博士学位，2011年6月至2014年9月在美国哈佛大学从事博士后研究，获得Lawrence Golub Postdoctoral Fellowship奖学金。2014年12月加入清华大学物理系至今。