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物理学院“博约学术论坛”系列报告(第154期)

发布日期:2018年06月22日
题目:Flavortronics in Transition Metal Dichalcogenides

报告人:张帆 教授(美国德州大学达拉斯分校)

时  间:2018年6月23日(周六) 下午16:00

地  点:新葡萄京娱乐场8455中心教学楼501

摘要:The family of atomically thin transition metal dichalcogenides (TMDs) is a rapidly rising star on the horizon of condensed matter physics and has already revealed a number of spin-valley-helicity coupled optical phenomena. More fascinatingly, our recent magnetotransport measurements have provided compelling evidence for the presence of a three-fold Q-valley degeneracy in few-layer n-type TMDs. These Q valleys offer an unprecedented opportunity to realize the solid-state version of flavor SU(3) symmetry that has been rare in electron systems to date and to explore novel electromagnetic phenomena that can arise from the interplay between the emergent symmetry and electron-electron interactions. In this talk, I will discuss our recent experimental progress on quantum transport in few-layer TMDs and our theory of the emergent flavortronics. Particularly, we predict a pure flavor nematic phase and a flavorless charge-density-wave phase. Surprisingly, electrons carry flavor-dependent electric dipole moments even at zero magnetic field, rendering the nematics ferroelectric, allowing electric-field manipulation of the flavors, and leading to the concept of flavortronics.

简历:Dr. Zhang has been an Assistant Professor at the University of Texas at Dallas since 2014. His research focuses primarily on topological quantum matter, many-body interactions, and 2D quantum materials. More information can be found at https://sites.google.com/site/zhangfansetsail/home

联系方式:物理学院办公室 (68913163)

邀请人:刘铖铖             网 址:/

 

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