【大学频道】北京大学量子材料科学中心呈献 | Dan Shahar of The Weizmann Institute

更多精彩视频登陆网站

www.koushare.com

图 | Dan Shahar

题   目：Disordered superconductors near T=0报告人：Dan Shahar单   位：The Weizmann Institute时   间：2019-11-13地   点：北京大学

扫码观看精彩报告视频

报告摘要

It turns out that, surprisingly, superconductors have not been studied extensively near T=0. This is mainly because the experimentally accessible and technologically interesting range is usually closer to Tc. With disorder superconductors one obtains the advantage that measurements can be performed down to the mK range. But there, the weak coupling of the Cooper-pair condensate to the thermal phonon system impose severe limitations on reaching equilibrium conditions. There are two different but related manifestations of this that we will discuss. The first is the ubiquitous observation that thin-film superconductors exhibit distinct saturation of the resistance as T approaches zero. We had shown that it can be a result of extrenous electrical noise impinging on the sample.the second is related to the critical current that we measure at low temperatures. We demonstrate that the critical current is a result of nonequilibrium, bi-stable condition that the electronic system develops. Using this approach we are able to predict the critical current in our films to within 1%.

个人简介

Prof. Dan Shahar  received his Ph.D. in 1995 from  Princeton University; he was  a Postdoctoral Research Assistant at Princeton University during 2012–2014; He has been a Professor of Physics at The Weizmann Institute since 2015.

—— ——往期精彩回顾—— ——●【大学频道】北京大学量子材料科学中心呈献 | 香港大学陈钢教授：Quantum excitations of "hidden orders" and Thermal transport of "hidden particles"●【大学频道】北京大学量子材料科学中心呈献 | 北京大学张亿博士：Machine Learning for Quantum Materials and Algorithms●【大学频道】北京大学量子材料科学中心呈献 | 中国人民大学刘正鑫教授：Quantum Spin Liquid Phases in Extended Kitaev Model●【大学频道】北京大学量子材料科学中心呈献 | 普林斯顿大学张骏祎：Dipolar Dimer Liquid●【大学频道】北京大学量子材料科学中心呈献 | 东京大学龚宗平博士：Topological phases of non-Hermitian systems●【大学频道】北京大学量子材料科学中心呈献 | Yonglong Xie of Princeton University: Visualizing topological and correlated phases with a scanning tunneling microscope●【大学频道】北京大学量子材料科学中心呈献 | 犹他大学黄华卿研究员：Theoretically Tracing Topological States: from crystals to quasicrystals and to noncrystalline systems●【大学频道】北京大学量子材料科学中心呈献 | Hengyun Zhou of Harvard University：Surpassing the Interaction Limit to Quantum Metrology with Fault-Tolerant Control

END

为满足更多科研工作者的需求，蔻享学术推出了蔻享APP以及相应的微信公众号，并开通了各科研领域的微信交流群。

蔻享APP

蔻享学术公众号

进群请添加微信：18256943123

小编拉您入群哟！未经许可，禁止转载本页内容转载授权请联系：[e-mail]戳这里，观看精彩视频哟！