Department of Physics and Astronomy: Publications and Other Research
Evgeny Tsymbal Publications
ORCID IDs
Tsymbal http://orcid.org/0000-0002-6728-5572
Document Type
Article
Date of this Version
8-27-2019
Citation
Physical Review Applied (2019 12: 024056
doi: 10.1103/PhysRevApplied.12.024056
Abstract
Using a simple quantum-mechanical model, we explore a tunneling anisotropic magnetoresistance (TAMR) effect in ferroelectric tunnel junctions (FTJs) with a ferromagnetic electrode and a ferroelectric barrier layer, where spontaneous polarization gives rise to the Rashba and Dresselhaus spin-orbit coupling (SOC). For realistic parameters of the model, we predict sizable TAMR measurable experimentally. For asymmetric FTJs, whose electrodes have different work functions, the built-in electric field affects the SOC parameters and leads to TAMR being dependent on the ferroelectric polarization direction. The SOC change with polarization switching affects tunneling conductance, revealing an alternative mechanism of tunneling electroresistance. These results demonstrate alternative functionalities of FTJs, which can be explored experimentally and used in electronic devices.
Comments
Copyright © 2019, American Physical Society. Used by permission