Inversion Symmetry Breaking Cobaltates and Vanadates for Orbital FETs
Abstract
The project aims to develop new materials with new and enhanced functionalities, enabling new platforms, such as the development of a conducting channel of a logic switch that relies on orbital polarization. The approach we propose takes advantage of the unique properties of complex oxides, which exhibit a wide range of electronic and magnetic phenomena, including magnetism, metal-insulator transitions and ferroelectricity. A key challenge for this project is to understand the orbital and electronic states of transition metal oxides and how their performance can be enhanced using dimensional confinement and interfacial coupling. The approach of the project is to devise new materials implementing oxide heterostructures that exhibit enhanced magnetic and conductive properties. We use a combination of experimental techniques and theoretical analyses to show how charge and spin order parameters are coupled and how to unglue and modify them by the two distinct effects of heterostructuring, namely dimensional confinement and interfacial reconstructions. The reduced dimensionality of transition metal oxides results in novel properties, which are not found in bulk. The electronic reconstructions imposed by the interface, on the other hand, lead to new properties and phases. This unique phase control can be generally applied to develop otherwise hidden electronic and magnetic behavior in a wide range of materials, such as the superconductor FeSe, topological insulators, nickelates, and cobaltates. This project also provides a rich research environment for students by providing opportunities for international collaborations to perform and propose experiments at international synchrotron facilities.
Document Details
- Document Type
- Technical Report
- Publication Date
- Nov 17, 2022
- Accession Number
- AD1190036
Entities
People
- Charles Ahn
Organizations
- Yale University