Nanoelectronic Phenomena in Low-Dimensional Ferroelectrics

Date

Sep 29, 2022 - Sep 30, 2022

Time

9:00 AM - 9:00 AM

Speaker

Prof. Alexei Gruverman

Affiliation

Department of Physics and Astronomy, University of Nebraska-Lincoln

Language

en

Main Topic

Informatik

Description

<p style="text-align: justify;">Just over 100 years since the discovery of ferroelectricity, this phenomenon still remains a center of intense research. The electrically switchable polarization, which is strongly coupled to the physical properties of ferroelectrics, determines the multifunctional nature of their responses to the external stimuli and underpins our ability to address a range of technological applications related to future computing. Over the last decade there has been a remarkable expansion of the already vast family of ferroelectrics due to emergence of polar-ordered phases in two-dimensional variants of traditionally non-ferroelectric materials. In the first part of my lecture, I will discuss a nanoscale insight into the electronic and electromechanical properties of one of the most exciting groups of emerging ferroelectrics - HfO2 family of simple oxides. Visualization of time-voltage dependent domain structure evolution reveals the underlying physical mechanisms of unconventional ferroelectric behavior of these materials. In the second part, I will discuss emergence of a polar phase in 2D transition metal dichalcogenides (TMD), and challenges associated with demonstration of their polar behavior and a possibility of tuning their electronic properties via control of polarization. Finally, I will discuss the emerging electronic phenomena in the hybrid 2D structures comprised of 2D TMD and ferroelectric films. Incorporation of these materials into the integrated structures provides a novel technological platform for ultra-scaled devices with enhanced functional performance.</p>

Last modified: Sep 29, 2022, 12:09:55 AM