天津大学

报告摘要：

TiSe₂ is a typical transition-metal dichalcogenide known for its charge-density wave order. In this study, we report the observation of an unusual anisotropic negative magnetoresistance in exfoliated TiSe₂ nanoflakes at low temperatures. Unlike the negative magnetoresistance reported in most other transition-metal dichalcogenides, our results cannot be explained by either the conventional two-dimensional weak localization effect or the Kondo effect. A comprehensive analysis of the data suggests that the observed anisotropic negative magnetoresistance in TiSe₂ flakes is most likely caused by the three-dimensional weak localization effect. Our findings offer valuable information for understanding the phase-coherent transport processes in TiSe₂.

报告人简介：

杨帆，2007年本科毕业于南京大学物理系，2012年于中科院物理所获得博士学位，2012 - 2018 年先后在大阪大学和科隆大学从事博士后研究，2018年至今在天津大学物理系量子交叉研究中心工作，任北洋英才计划长聘副教授、研究员。杨帆的主要研究方向为量子输运和微纳米量子器件，共发表论文20余篇，被引用2000余次。

邀请人：谌志国

联系电话：82649030

地点：物理所M楼631

腾讯会议ID：795-238-455