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Strain driven emergence of topological non-triviality in YPdBi thin films

Authors :
Bhardwaj, Vishal
Bhattacharya, Anupam
Srivastava, Shivangi
Khovaylo, Vladimir V.
Sannigrahi, Jhuma
Banerjee, Niladri
Mani, Brajesh K.
Chatterjee, Ratnamala
Publication Year :
2020

Abstract

Half-Heusler compounds exhibit a remarkable variety of emergent properties such as heavy-fermion behaviour, unconventional superconductivity and magnetism. Several of these compounds have been predicted to host topologically non-trivial electronic structures. Remarkably, recent theoretical studies have indicated the possibility to induce non-trivial topological surface states in an otherwise trivial half-Heusler system by strain engineering. Here, using magneto-transport measurements and first principles DFT-based simulations, we demonstrate topological surface states on strained [110] oriented thin films of YPdBi grown on (100) MgO. These topological surface states arise in an otherwise trivial semi-metal purely driven by strain. Furthermore, we observe the onset of superconductivity in these strained films highlighting the possibility of engineering a topological superconducting state. Our results demonstrate the critical role played by strain in engineering novel topological states in thin film systems for developing next-generation spintronic devices.<br />Comment: 20 pages, 5 Figures

Details

Database :
arXiv
Publication Type :
Report
Accession number :
edsarx.2009.03018
Document Type :
Working Paper