Fermi surface topology and signature of surface Dirac nodes in LaBi

Abstract Novel topological state of matter is one of the rapidly growing fields in condensed matter physics research in recent times. While these materials are fascinating from the aspect of fundamental physics of relativistic particles, their exotic transport properties are equally compelling due t...

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Autores principales:	Ratnadwip Singha, Biswarup Satpati, Prabhat Mandal
Formato:	article
Lenguaje:	EN
Publicado:	Nature Portfolio 2017
Materias:	Medicine R Science Q
Acceso en línea:	https://doaj.org/article/5357d6444af0420299e65ea7f991566a
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spelling	oai:doaj.org-article:5357d6444af0420299e65ea7f991566a2021-12-02T15:05:29ZFermi surface topology and signature of surface Dirac nodes in LaBi10.1038/s41598-017-06697-92045-2322https://doaj.org/article/5357d6444af0420299e65ea7f991566a2017-07-01T00:00:00Zhttps://doi.org/10.1038/s41598-017-06697-9https://doaj.org/toc/2045-2322Abstract Novel topological state of matter is one of the rapidly growing fields in condensed matter physics research in recent times. While these materials are fascinating from the aspect of fundamental physics of relativistic particles, their exotic transport properties are equally compelling due to the potential technological applications. Extreme magnetoresistance and ultrahigh carrier mobility are two such major hallmarks of topological materials and often used as primary criteria for identifying new compounds belonging to this class. Recently, LaBi has emerged as a new system, which exhibits the above mentioned properties. However, the topological nature of its band structure remains unresolved. Here, using the magnetotransport and magnetization measurements, we have probed the bulk and surface states of LaBi. Similar to earlier reports, extremely large magnetoresistance and high carrier mobility have been observed with compensated electron and hole density. The Fermi surface properties have been analyzed from both Shubnikov-de Haas and de Haas-van Alphen oscillation techniques. In the magnetization measurement, a prominent paramagnetic singularity has been observed, which demonstrates the non-trivial nature of the surface states in LaBi. Our study unambiguously confirms that LaBi is a three-dimensional topological insulator with possible linear dispersion in the gapped bulk band structure.Ratnadwip SinghaBiswarup SatpatiPrabhat MandalNature PortfolioarticleMedicineRScienceQENScientific Reports, Vol 7, Iss 1, Pp 1-9 (2017)
institution	DOAJ
collection	DOAJ
language	EN
topic	Medicine R Science Q
spellingShingle	Medicine R Science Q Ratnadwip Singha Biswarup Satpati Prabhat Mandal Fermi surface topology and signature of surface Dirac nodes in LaBi
description	Abstract Novel topological state of matter is one of the rapidly growing fields in condensed matter physics research in recent times. While these materials are fascinating from the aspect of fundamental physics of relativistic particles, their exotic transport properties are equally compelling due to the potential technological applications. Extreme magnetoresistance and ultrahigh carrier mobility are two such major hallmarks of topological materials and often used as primary criteria for identifying new compounds belonging to this class. Recently, LaBi has emerged as a new system, which exhibits the above mentioned properties. However, the topological nature of its band structure remains unresolved. Here, using the magnetotransport and magnetization measurements, we have probed the bulk and surface states of LaBi. Similar to earlier reports, extremely large magnetoresistance and high carrier mobility have been observed with compensated electron and hole density. The Fermi surface properties have been analyzed from both Shubnikov-de Haas and de Haas-van Alphen oscillation techniques. In the magnetization measurement, a prominent paramagnetic singularity has been observed, which demonstrates the non-trivial nature of the surface states in LaBi. Our study unambiguously confirms that LaBi is a three-dimensional topological insulator with possible linear dispersion in the gapped bulk band structure.
format	article
author	Ratnadwip Singha Biswarup Satpati Prabhat Mandal
author_facet	Ratnadwip Singha Biswarup Satpati Prabhat Mandal
author_sort	Ratnadwip Singha
title	Fermi surface topology and signature of surface Dirac nodes in LaBi
title_short	Fermi surface topology and signature of surface Dirac nodes in LaBi
title_full	Fermi surface topology and signature of surface Dirac nodes in LaBi
title_fullStr	Fermi surface topology and signature of surface Dirac nodes in LaBi
title_full_unstemmed	Fermi surface topology and signature of surface Dirac nodes in LaBi
title_sort	fermi surface topology and signature of surface dirac nodes in labi
publisher	Nature Portfolio
publishDate	2017
url	https://doaj.org/article/5357d6444af0420299e65ea7f991566a
work_keys_str_mv	AT ratnadwipsingha fermisurfacetopologyandsignatureofsurfacediracnodesinlabi AT biswarupsatpati fermisurfacetopologyandsignatureofsurfacediracnodesinlabi AT prabhatmandal fermisurfacetopologyandsignatureofsurfacediracnodesinlabi
_version_	1718388828852453376

Fermi surface topology and signature of surface Dirac nodes in LaBi

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