Berlin 2024 – wissenschaftliches Programm
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DS: Fachverband Dünne Schichten
DS 16: Focus Session: 2D Transition Metal Carbides, Nitrides and Carbonitrides III (joint session DS/MM/O)
DS 16.6: Vortrag
Donnerstag, 21. März 2024, 17:00–17:15, A 053
2D to 3D weak localization dimensional crossover in Ti3C2Tx MXene induced by thickness and defect engineering — •Sophia Tangui1, Simon Hurand1, Lola Loupias2, Stéphane Célérier2, Ayoub Benmoumen1,3, Philippe Moreau3, Marie-Laure David1, and Vincent Mauchamp1 — 1Université de Poitiers, ISAE-ENSMA, CNRS, PPRIME, Poitiers France — 2Université de Poitiers, CNRS, IC2MP, Poitiers, France — 3Nantes Université, CNRS, IMN, Nantes, France
Due to their hydrophilic properties and very good metallic electrical behavior, MXenes are promising materials for numerous applications, including transparent conductive thin films. Therefore, there is a need to unravel the transport mechanism involved in MXene multilayers. Although weak localization (WL) has been proposed as the dominating low-temperature transport mechanism in thin films, there have been however few attempts to model quantitatively temperature and magnetic field dependent resistivity measurements.
In this talk, we will focus on the dimensionality of the low-temperature transport mechanisms in spin coated thin films elaborated with the most-studied and metallic Ti3C2Tx MXene. The influence of the thin film thickness on one hand and of defects introduced by ion irradiation at different fluences on the other hand is studied by low temperature and magnetic field dependant resistivity measurements. The data are analyzed in the framework of both 2D and 3D models : we will demonstrate a non-trivial evolution between the two behaviors and discuss the validity of both models.
Keywords: MXene; 2D transition metal carbides; electrical properties; weak localization