Nanoindentation of single‐crystal Bi2Te3 topological insulators grown with the Bridgman–Stockbarger method

Caterina Lamuta; Anna Cupolillo; Antonio Politano; Ziya S Aliev; Mahammad B Babanly; Evgueni V Chulkov; Marco Alfano; Leonardo Pagnotta

doi:10.1002/pssb.201552760

Journal article

Nanoindentation of single‐crystal Bi2Te3 topological insulators grown with the Bridgman–Stockbarger method

Caterina Lamuta, Anna Cupolillo, Antonio Politano, Ziya S Aliev, Mahammad B Babanly, Evgueni V Chulkov, Marco Alfano and Leonardo Pagnotta

physica status solidi (b), Vol.253(6), pp.1082-1086

06/2016

DOI: 10.1002/pssb.201552760

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Abstract

In this work, bismuth telluride (Bi2Te3) single crystals were grown from melted polycrystalline Bi–Te material using the Bridgman–Stockbarger method. Crystalline quality and surface chemistry were investigated through X‐ray diffraction analysis and X‐ray photoelectron spectroscopy. The mechanical properties were investigated by means of depth‐sensing nanoindentation tests carried out using the continuous stiffness measurement (CSM) technique. In turn, the distribution of material hardness and Young's modulus in the depth direction (i.e., perpendicular to the single crystal basal plane) were resolved and quantitative comparisons with the available data extracted from previous literature works were drawn. It is shown that the obtained single crystals are free of contaminants and/or oxide phases and that the mechanical properties lie between those reported in recent literature for Bi2Te3 polycrystalline thin films and 2D nanosheets.

topological insulator

Bi2Te3

hardness

Young's modulus

nanoindentation

Bridgman–Stockbarger method

Details

Title: Subtitle: Nanoindentation of single‐crystal Bi2Te3 topological insulators grown with the Bridgman–Stockbarger method
Creators: Caterina Lamuta - University of Calabria
Anna Cupolillo - University of Calabria
Antonio Politano - University of Calabria
Ziya S Aliev - Donostia International Physics Center (DIPC)
Mahammad B Babanly - ANAS
Evgueni V Chulkov - Tomsk State University
Marco Alfano - University of Calabria
Leonardo Pagnotta - University of Calabria
Resource Type: Journal article
Publication Details: physica status solidi (b), Vol.253(6), pp.1082-1086
DOI: 10.1002/pssb.201552760
ISSN: 0370-1972
eISSN: 1521-3951
Number of pages: 5
Grant note: MaTeRiA (PONa3_00370) University of Basque Country UPV/EHU (GIC07‐IT‐756‐13) Tomsk State University Academic D.I. Mendeleev Fund Program (8.1.05.2015) Spanish Ministry of Economy and Competitiveness MINECO (FIS2013‐48286‐C2‐1‐P) Departamento de Educación del Gobierno Vasco (FIS2010‐275) Saint Petersburg State University (11.50.202.2015) Spanish Ministerio de Ciencia e Innovación (19609‐C02‐01)
Language: English
Date published: 06/2016
Academic Unit: Mechanical Engineering
Record Identifier: 9984064202802771

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