April 22 - 26, 2024
Seattle, Washington
May 7 - 9, 2024 (Virtual)

Event Supporters

2024 MRS Spring Meeting
QT07.02.01

Two-Dimensional Topological States in Thin Films of Cadmium Arsenide

When and Where

Apr 23, 2024
1:30pm - 2:00pm
Room 448, Level 4, Summit

Presenter(s)

Co-Author(s)

Susanne Stemmer1,Binghao Guo1,Alexander Lygo1,Wangqian Miao1,Xi Dai2

University of California, Santa Barbara1,The Hong Kong University of Science and Technology2

Abstract

Susanne Stemmer1,Binghao Guo1,Alexander Lygo1,Wangqian Miao1,Xi Dai2

University of California, Santa Barbara1,The Hong Kong University of Science and Technology2
In this talk, we will discuss two-dimensional topological states in high-quality thin films of cadmium arsenide (Cd<sub>3</sub>As<sub>2</sub>) grown by molecular beam epitaxy. Cd<sub>3</sub>As<sub>2</sub> is known to belong to a class of topological materials known as three-dimensional Dirac semimetals, but, as we will discuss in this presentation, in thin films it can be tuned between a variety of topological phases. We will discuss the evolution of the electronic states of Cd<sub>3</sub>As<sub>2</sub> films as their thickness is scaled. We also discuss a two-dimensional Weyl semimetal phase that is obtained under applied in-plane magnetic fields. We show that magnetotransport studies can distinguish between the different topological phases.

Keywords

Hall effect | quantum materials | thin film

Symposium Organizers

Rafal Kurleto, University of Colorado Boulder
Stephan Lany, National Renewable Energy Laboratory
Stephanie Law, The Pennsylvania State University
Hsin Lin, Academia Sinica

Session Chairs

Kirstin Alberi
Stephanie Law

In this Session