Abstract：

　　The electronic structure of matter is critical information that determine its electric, magnetic and optical properties. The precise understanding of such information will not only help understand the rich properties and physical phenomena of quantum materials, but also guide the design of their potential applications.

Angle-resolved photoemission spectroscopy (ARPES) is an effective method in determining the electronic structures of materials: with its energy and momentum resolution, ARPES can directly visualize electronic band structures with critical parameters (such as the energy gap, band width, carrier type, lifetime, density and the Fermi-velocity, etc.).

　　In this talk, I will first give a brief introduction to this powerful experimental technique and its application to topological quantum materials (including topological insulators, topological Dirac/Weyl semimetals and topological superconductor candidates [1]). Finally, I will review the recent development in ARPES and give a perspective on its future directions and applications.

References

(1) Science, 325, 178 (2009), Science, 329, 659 (2010), Nat.Nanotech, 6, 705 (2011), Nat. Chem, 4, 281 (2012),  Nat. Phys., 9, 704 (2013), Science, 343, 864 (2014), Nat. Mater., 13, 677 (2014), Nat. Phys., 11, 728 (2015), Nat. Mater., 15, 27(2016), Nat. Commun. 7, 12924 (2016), Nat Commun. 8, 13973 (2017). Nat. Commun. 9, 56 (2018), Science, 362, 65 (2018), Nat. Rev. Mater., 3, 341 (2018), Nat Commun, 10, 3478 (2019), Nat. Phys. 15, 759 (2019)

Biosketch：

　　Yulin received his B.S. from the University of Science & Technology of China in 2000 and Ph.D. in Physics from Stanford University in 2008. After briefly working at SLAC National Accelerator Laboratory (postdoctoral research (2008-2009), associate staff scientist (2009-2010), staff scientist (2010-2011)), he joined the University of Oxford in 2012 as a Fellow of the Jesus College and University Lecturer, then as an associate professor since 2014. Yulin is also an adjunct professor in Tsinghua University and a distinguished adjunct professor in ShanghaiTech University since 2014. Yulin’s research interest lies in understanding the behavior of electrons in unconventional materials, including topological quantum materials, strongly correlated electron systems and functional materials. Yulin is also devoted in developing advanced instrumentation with new capability to drive the current research frontier. Due to his contribution to the field of topological quantum materials, he was awarded the William E. and Diane M. Spicer Young Investigator Award (2009), OCPA Outstanding Young Research Award (2012) and the Nakamura Lecture Award (2017)