Dear all,We have an exciting talk this week by Vasudevan Iyer from Xianfan Xu's group about optically measuring spin relaxation in a 3D topological insulator.What: NSAC Coffee Hour talkWhen: Friday, 2/16/2018 3:30 pmWhere: BNC AtriumSpeaker: Vasudevan IyerTopic: Optically Measuring Spin Relaxation in a 3D Topological InsulatorThere will be blueberry bie, Milanos, Pirolinos, and of course coffee!Also, please feel free to sign up for the Spring coffee hour slots in the Google sheet by clicking here.Thank you,-Samuel Peana