(Invited) Custom Low-Dimensional Material Systems Explored at the Atomic Scale
At a Glance
Section titled âAt a Glanceâ| Metadata | Details |
|---|---|
| Publication Date | 2020-05-01 |
| Journal | ECS Meeting Abstracts |
| Authors | Adina LuicanâMayer |
| Institutions | University of Ottawa |
Abstract
Section titled âAbstractâInnovative technologies have a history of capitalizing on the discovery of new physical phenomena, often at the confluence of advances in material characterization techniques and innovations in design and controlled synthesis of high-quality materials. Pioneered by the discovery of graphene, atomically thin materials (2D materials) hold the promise for realizing physical systems with distinct properties, previously inaccessible. In this talk I will describe experiments that seek to uncover the novel physical phenomena in 2D materials by using scanning tunneling microscopy and spectroscopy (STM/STS) and supporting spectroscopic techniques. Firstly, I will discuss the 1T polymorph of TaS 2 , which has one of the richest phase diagrams among the layered transition metal dichalcogenides and address the question of crossover from bulk to few layers. Secondly, I will describe atomic-scale characterization of the in-plane anisotropic semiconductor ReS 2 . We demonstrate that rhenium atoms form diamond-shaped clusters, organized in disjointed chains, and characterize the semiconducting electronic band gap by STS. By spatially mapping the local density of states around defects in ReS 2 , we explore their origin and electrostatic nature.