Phase transition at 350 K in the Ti₃ C₂ T_x MXene: Possible sliding or moiré ferroelectricity

Autor(en)

Francesco Cordero, Hanna Pazniak, Thierry Ouisse, Jesus Gonzalez-Julian, Aldo Di Carlo, Viktor Soprunyuk, Wilfried Schranz

Abstrakt

A phase transition is found in Ti3C2Tx MXene at 350 K, by measuring the complex Young's modulus of self-standing thick films. A steplike softening and increase of the mechanical losses is found below 350 K, indicative of a phase transition, where the square of the order parameter is coupled to strain. It is argued that it should be a ferroelectric transition, most likely of the sliding (moiré) type, due to charge transfer between facing flakes sliding with respect to each other. If the transition will be confirmed to be ferroelectric, Ti3C2Tx will be added to the class of metallic ferroelectrics and open new perspectives of applications, in addition to the numerous already studied.

Organisation(en)

Physik Funktioneller Materialien

Externe Organisation(en)

Consiglio Nazionale delle Ricerche, Université Grenoble-Alpes, Rheinisch-Westfälische Technische Hochschule Aachen

Journal

Physical Review B

Band

109

Anzahl der Seiten

8

ISSN

2469-9950

DOI

https://doi.org/10.1103/PhysRevB.109.024105

Publikationsdatum

01-2024

Peer-reviewed

Ja

ÖFOS 2012

103015 Kondensierte Materie, 103018 Materialphysik

ASJC Scopus Sachgebiete

Electronic, Optical and Magnetic Materials, Condensed Matter Physics

Link zum Portal

https://ucrisportal.univie.ac.at/de/publications/fe2cd466-3336-43a4-b281-fea0763dc69c