Surface and interface properties of 2D devices revealed by operando X-ray nanospectroscopy

Abstract

Our urgent goal is to achieve a sustainable society where a healthy global environment and prosperous economic activity can coexist. For this purpose, we have to develop devices utilizing nanomaterials, such as 2D atomic layers. To maximize device performance, I have exploited operando x-ray spectromicroscopies that enable the nanoscopic elucidation of electronic structures of surfaces and interfaces of devices under operation. I have succeeded in applying these spectromicroscopies for the research and development of devices utilizing 2D atomic layers and AlGaN/GaN 2D electron systems, and contributed to designations that maximize device performance. Currently, I am implementing a novel method to quantitatively connect nanoscale surfaces and interface properties with device functions that appear macroscopically.