CE30 - Physique de la matière condensée et de la matière diluée

Electronic properties of strained antimonene and graphene/antimonene heterostructures – SAGA

Submission summary

The research on two dimensional (2D) materials is experiencing, nowadays, an extraordinary rise. Two are the main objectives that drives this scientific field: the fabrication and characterization of novel 2D materials and the vertical stacking of different 2D crystals (van der Walls heterostructures) with the desired properties. In this respect antimonene is attracting an increasing attention. Antimonene is a trivial semiconductor which is expected to be tuned to a 2D topoloigical insulator by strain. Moreover the antimonene/graphene interface has been proposed for energy applications such as in batteries, in electrocatalisis, and supercapacitors. In this project we will first investigate experimentally, for the first time, the electronic band structure of antimonene under tensile strain probing the existance of the topological phase. Once realized, strained antimonene will be a very promising candidate material for the observation of quantum spin Hall effect at room temperatures, which is a step forward toward the use of 2D topological insulators in electronic devices with low power consumption.
Secondly we will produce and address the electronic structure of a graphene/antimonene van der Waals heterostructure. With our sample growth method, we will be able to fabricate an heterostructure where the graphene and the strained antimonene band structure are located in the same region of reciprocal space. After the electronic hybridization of the two constituen, we will probe the trasfer of the antimonene topological protection on the graphene electronic properties by proximity effects. If the transfer will be efficient, we will than have a novel van der Waals heterostructure in which both the graphene outstaing electrons mobility and the antimonene topological protection are present and coupled toghether. Moreover the graphene will act as a protective membrane against oxidation making the system suitable for device fabrication.

Project coordination

Sergio Vlaic (Laboratoire de Physique et d'Etude des Matériaux)

The author of this summary is the project coordinator, who is responsible for the content of this summary. The ANR declines any responsibility as for its contents.

Partner

LPEM Laboratoire de Physique et d'Etude des Matériaux

Help of the ANR 263,520 euros
Beginning and duration of the scientific project: December 2021 - 36 Months

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