报告信息

唐仲英楼A313
报告日期 : 2016年10月20日
时间: 10:00
报告人: 路欣

报告题目:Exotic Quantum States in Heavy Fermion Systems

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摘要
Heavy fermion materials have served as a classical prototype of strongly correlated electron systems (SCES), where exotic quantum states emerge, such as anti-ferromagnetism, superconductivity and multipole ordering, due to the correlation effects between localized f and conduction electrons. Firstly, I will discuss the Cd-doping in the heavy fermion superconductor CeCoIn5, where spin-droplets are proposed to nucleate around the Cd-dopants due to quantum critical fluctuations, forming an inhomogeneous electronic state. Secondly, I will focus on the mysterious “hidden order” states in heavy-fermion materials URu2Si2 and PrFe4P12. Our point-contact spectroscopy results indicate a common Fermi surface gapping, which suggest the probable itinerant nature of the hidden multipolar ordering in the general context of dichotomy of localization and itineracy in f-electron systems.

Reference
S. Seo, et al., Nature Physics 10, 120 (2014)
Y. Chen, et al. Phys. Rev. Lett. 114, 146403 (2015) 
X. Lu et al., Phys. Rev. B 85, 020402(R) (2012)

报告人简介
路欣博士任职于浙江大学关联物质研究中心,特聘研究员,目前主要从事重费米子和超导方面的研究。2003年本科毕业于北京大学,2009年在美国伊利诺伊大学香槟分校取得博士学位,2010-2012年在洛斯阿拉莫斯国家实验从事博士后研究工作。2013年入职浙江大学,在Nature Physics, PRL等国际期刊发表SCI论文多篇,曾入选浙江省海外高层次人才引进计划创新类人才。