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

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...

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Autores principales:	Vishal Bhardwaj, Anupam Bhattacharya, Shivangi Srivastava, Vladimir V. Khovaylo, Jhuma Sannigrahi, Niladri Banerjee, Brajesh K. Mani, Ratnamala Chatterjee
Formato:	article
Lenguaje:	EN
Publicado:	Nature Portfolio 2021
Materias:	Medicine R Science Q
Acceso en línea:	https://doaj.org/article/bd92655b3f504c1b9f202bbe16e6c283
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spelling	oai:doaj.org-article:bd92655b3f504c1b9f202bbe16e6c2832021-12-02T14:17:16ZStrain driven emergence of topological non-triviality in YPdBi thin films10.1038/s41598-021-86936-22045-2322https://doaj.org/article/bd92655b3f504c1b9f202bbe16e6c2832021-04-01T00:00:00Zhttps://doi.org/10.1038/s41598-021-86936-2https://doaj.org/toc/2045-2322Abstract 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.Vishal BhardwajAnupam BhattacharyaShivangi SrivastavaVladimir V. KhovayloJhuma SannigrahiNiladri BanerjeeBrajesh K. ManiRatnamala ChatterjeeNature PortfolioarticleMedicineRScienceQENScientific Reports, Vol 11, Iss 1, Pp 1-10 (2021)
institution	DOAJ
collection	DOAJ
language	EN
topic	Medicine R Science Q
spellingShingle	Medicine R Science Q Vishal Bhardwaj Anupam Bhattacharya Shivangi Srivastava Vladimir V. Khovaylo Jhuma Sannigrahi Niladri Banerjee Brajesh K. Mani Ratnamala Chatterjee Strain driven emergence of topological non-triviality in YPdBi thin films
description	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.
format	article
author	Vishal Bhardwaj Anupam Bhattacharya Shivangi Srivastava Vladimir V. Khovaylo Jhuma Sannigrahi Niladri Banerjee Brajesh K. Mani Ratnamala Chatterjee
author_facet	Vishal Bhardwaj Anupam Bhattacharya Shivangi Srivastava Vladimir V. Khovaylo Jhuma Sannigrahi Niladri Banerjee Brajesh K. Mani Ratnamala Chatterjee
author_sort	Vishal Bhardwaj
title	Strain driven emergence of topological non-triviality in YPdBi thin films
title_short	Strain driven emergence of topological non-triviality in YPdBi thin films
title_full	Strain driven emergence of topological non-triviality in YPdBi thin films
title_fullStr	Strain driven emergence of topological non-triviality in YPdBi thin films
title_full_unstemmed	Strain driven emergence of topological non-triviality in YPdBi thin films
title_sort	strain driven emergence of topological non-triviality in ypdbi thin films
publisher	Nature Portfolio
publishDate	2021
url	https://doaj.org/article/bd92655b3f504c1b9f202bbe16e6c283
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Strain driven emergence of topological non-triviality in YPdBi thin films

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