Reconfigurable Ferroelectric‐Like Two‐Dimensional Electron Gas at Room Temperature
Abstract
ABSTRACT Engineering ferroelectric two‐dimensional electron gases (2DEGs) offers a promising route toward nonvolatile and reconfigurable electronic functionalities, yet room temperature implementations remain scarce. Here, we report a room temperature ferroelectric‐like 2DEG at the SrO‐ interface between (001) (STO) and (KNN) thin films. Robust ferroelectricity is confirmed by piezoforce microscopy, optical second harmonic generation, Nb‐/Ti‐ edges x‐ray linear dichroism, scanning transmission electron microscopy, and macroscopic polarization measurements. The ferroelectric polarization enables nonvolatile control of interfacial transport and the realization of reconfigurable conducting channels with arbitrary geometry at room temperature. The coupling between ferroelectric order and 2DEG conductivity arises from the extension of the polarization into the interfacial unit cells hosting the electron gas. These results establish / heterostructures as a ferroelectric‐like oxide electronic platform, opening pathways for low‐power, nonvolatile electronic and spin‐orbitronic devices.
Article Details
Authors (17)
Martando Rath
CNR‐SPIN Complesso Univ. Monte S. Angelo Naples Italy
Yu Chen
Daniela Stornaiuolo
CNR‐SPIN Complesso Univ. Monte S. Angelo Naples Italy
Aravind Raji
Laboratoire de Physique de Solides, CNRS Université Paris‐Saclay Paris France
Alexandre Gloter
Antonio Cassinese
CNR‐SPIN Complesso Univ. Monte S. Angelo Naples Italy
Andrea Rubano
Department of Physics, University of Naples Federico II Complesso Univ. Monte S. Angelo Naples Italy
Alessia Sambri
CNR‐SPIN Complesso Univ. Monte S. Angelo Naples Italy
Domenico Paparo
Department of Physics, University of Naples Federico II Complesso Univ. Monte S. Angelo Naples Italy
Emiliano Di Gennaro
CNR‐SPIN Complesso Univ. Monte S. Angelo Naples Italy
Jérôme Lecourt
Laboratoire CRISMAT, CNRS Université de Caen Normandie Caen France
Wilfrid Prellier
Francesco Rosa
Nicholas B. Brookes
ESRF The European Synchrotron Grenoble France
Giacomo Ghiringhelli
Dipartimento di Fisica Politecnico di Milano Milano Italy
Daniele Preziosi
Université de Strasbourg, CNRS, IPCMS UMR 7504 1 Département de Chimie de la Matière Inorganique, , Strasbourg F-67034,
Marco Salluzzo
CNR‐SPIN Complesso Univ. Monte S. Angelo Naples Italy