报告题目:Electronic Nematicity in URu2Si2 Revisited
报告人:何明全(重庆大学物理学院)
时间:2020年7月10号(星期五)下午14点00分
地点:物理学院LE705
邀请人:软聚态物理及智能材料研究重庆市重点实验室
报告摘要：
The nature of the hidden-order (HO) state in URu2Si2 remains one of the major unsolved issues in heavy-fermion physics.Recently,torque magnetometry,x-ray diffraction,and elastoresistivity data have suggested that the HO phase transition at THO≈17.5 K is driven by electronic nematic effects. Here,we search for thermodynamic signatures of this purported structural instability using anisotropic thermal expansion, Young’s modulus,elastoresistivity,and specific-heat measurements. In contrast to the published results,we find no evidence of a rotational symmetry breaking in any of our data.Interestingly,our elastoresistivitymeasurements,which are in full agreement with published results,exhibit a Curie-weiss divergence,which we however attributeto a volume and not to a symmetry-breaking effect.
报告人介绍：
重庆大学“百人计划”研究员。2010年于重庆大学应用物理系获得学士学位，2014年于香港科技大学物理系获得博士学位，随后赴德国卡尔斯鲁厄理工学院固体物理所从事博士后研究工作。2018年5月入职重庆大学物理学院。主要研究兴趣为超导及强关联电子体系。近年来在《Nature Communications》、《Physical Review Letters》、《ACS Nano》《Physical Review B》等期刊上发表SCI论文20余篇。
