Year: 2025
Type: article
Abstract: Transport across model junctions built by using atomic tip or lateral techniques can generate exotic quantum signatures. However, so far, a viable industrial pathway for atom-driven electronics has been lacking. Here, we demonstrate that a commercialized device platform can help to fill this nanotechnological gap. According to conducting tip atomic force microscopy, inserting C atoms into an ultrathin MgO layer generates nanotransport paths. Across microscale magnetic tunnel junctions, resonant tunneling causes large magnetoresistance peaks that we attribute to spin accumulation onto a C nanodot that the channels transport. We ascribe the concurrent presence of a spectrally localized, nonlinear current noise and a persistent memory effect to the charging of a 'gating' C nanodot, adjacent to the 'transport' C nanodot. This nanoscale dual-dot description of quantum transport across spin states within a microscale magnetic tunnel junction should stimulate further research toward maturing spintronics into a viable quantum technological track.
Source: Nano Letters
Authors: Mathieu Lamblin, Victor Da Costa, Loic Joly, Bhavishya Chowrira, Léo Petitdemange, Bertrand Vileno, Romain Bernard, Benoit Gobaut, Samy Boukari, Wolfgang Weber, Michel Hehn, Daniel Lacour, Martin Bowen
Institutions: Centre National de la Recherche Scientifique, Institut de Physique et Chimie des Matériaux de Strasbourg, Université de Strasbourg, Synchrotron SOLEIL, Institut de Chimie de Strasbourg, Institut Jean Lamour, Université de Lorraine, Sorbonne Université, Institut des NanoSciences de Paris
Language: English
Subfield: Condensed Matter Physics
Field: Physics and Astronomy
Domain: Physical Sciences
Open Access status: green
Awards: G1166465053, G1190173965, G1888088267, G1949054838, G1953887145, Par-delà les frontières, l'Université de Strasbourg, G2255650664, G2659019386, G2694206344, G2729097322, Façonner les talents en formation et en recherche à l'Université de Strasbourg, G3357951378, Advanced spintronic materials, G4050314531, G4779185514, G4941046983, Augmented Magnetic Sensing, Quantum Science and Nanomaterials, G574072235, Engineering Diamond Sensors for Advancing Science and Industry, G6136357505, G6276897512, G6803667113, Spintronic harvesting of ambient thermal fluctuations, G8050745384
OpenAlex ID: W4386384609