22-32 201
Walid Malaeb, Department of Physical Sciences, Lebanese American University.
Abstract
Photoemission Spectroscopy (PES) is a powerful technique in directly probing the electronic structure of solids especially in its angle-resolved mode (ARPES) [1,2]. For this purpose, synchrotron radiation as well as high-resolution lasers and other light sources have been used.
In this talk, I will present an overview on how we have been implementing this technique to uncover various aspects of the electronic structure of quantum materials, in particular the iron-pnictide high-Tc superconductors from the early stage since their discovery in Japan in 2008 [3]. The discussion will include the core energy levels [4], the three-dimensional electronic structure [5], the Fermi surfaces, superconducting gaps [6], the coupling to bosonic modes [7,8], etc. I will also present our recent work on -Sn which has recently gained much attention due to the diverse tunable topological phases it can reveal ranging from a topological insulator (TI) to a topological Dirac semimetal (TDS) depending on the applied strain in addition to its simple elemental structure, non-toxic nature and great potential for applications [9]. Finally, I will make a brief overview on the recent research projects we have launched at LAU related to the synthesis and characterization of nano-sized particles for various applications [10].
