Crystalline symmetry-protected non-trivial topology in prototype compound BaAl4

Abstract The BaAl4 prototype crystal structure is the most populous of all structure types, and is the building block for a diverse set of sub-structures including the famous ThCr2Si2 family that hosts high-temperature superconductivity and numerous magnetic and strongly correlated electron systems....

Descripción completa

Guardado en:

Detalles Bibliográficos
Autores principales:	Kefeng Wang, Ryo Mori, Zhijun Wang, Limin Wang, Jonathan Han Son Ma, Drew W. Latzke, David E. Graf, Jonathan D. Denlinger, Daniel Campbell, B. Andrei Bernevig, Alessandra Lanzara, Johnpierre Paglione
Formato:	article
Lenguaje:	EN
Publicado:	Nature Portfolio 2021
Materias:	Materials of engineering and construction. Mechanics of materials TA401-492 Atomic physics. Constitution and properties of matter QC170-197
Acceso en línea:	https://doaj.org/article/8a8f6a07bc2044c1b2bd52485b91a1c1
Etiquetas:	Agregar Etiqueta Sin Etiquetas, Sea el primero en etiquetar este registro!

id	oai:doaj.org-article:8a8f6a07bc2044c1b2bd52485b91a1c1
record_format	dspace
spelling	oai:doaj.org-article:8a8f6a07bc2044c1b2bd52485b91a1c12021-12-02T16:30:46ZCrystalline symmetry-protected non-trivial topology in prototype compound BaAl410.1038/s41535-021-00325-62397-4648https://doaj.org/article/8a8f6a07bc2044c1b2bd52485b91a1c12021-03-01T00:00:00Zhttps://doi.org/10.1038/s41535-021-00325-6https://doaj.org/toc/2397-4648Abstract The BaAl4 prototype crystal structure is the most populous of all structure types, and is the building block for a diverse set of sub-structures including the famous ThCr2Si2 family that hosts high-temperature superconductivity and numerous magnetic and strongly correlated electron systems. The MA4 family of materials (M = Sr, Ba, Eu; A = Al, Ga, In) themselves present an intriguing set of ground states including charge and spin orders, but have largely been considered as uninteresting metals. We predict the exemplary compound BaAl4 to harbor a three-dimensional Dirac spectrum with non-trivial topology and possible nodal lines crossing the Brillouin zone, wherein one pair of semi-Dirac points with linear dispersion along the k z direction and quadratic dispersion along the k x /k y direction resides on the rotational axis with C 4v point group symmetry. An extremely large, unsaturating positive magnetoresistance in BaAl4 despite an uncompensated band structure is revealed, and quantum oscillations and angle-resolved photoemission spectroscopy measurements confirm the predicted multiband semimetal structure with pockets of Dirac holes and a Van Hove singularity (VHS) remarkably consistent with the theoretical prediction. We thus present BaAl4 as a topological semimetal, casting its prototype status into a role as a building block for a vast array of topological materials.Kefeng WangRyo MoriZhijun WangLimin WangJonathan Han Son MaDrew W. LatzkeDavid E. GrafJonathan D. DenlingerDaniel CampbellB. Andrei BernevigAlessandra LanzaraJohnpierre PaglioneNature PortfolioarticleMaterials of engineering and construction. Mechanics of materialsTA401-492Atomic physics. Constitution and properties of matterQC170-197ENnpj Quantum Materials, Vol 6, Iss 1, Pp 1-9 (2021)
institution	DOAJ
collection	DOAJ
language	EN
topic	Materials of engineering and construction. Mechanics of materials TA401-492 Atomic physics. Constitution and properties of matter QC170-197
spellingShingle	Materials of engineering and construction. Mechanics of materials TA401-492 Atomic physics. Constitution and properties of matter QC170-197 Kefeng Wang Ryo Mori Zhijun Wang Limin Wang Jonathan Han Son Ma Drew W. Latzke David E. Graf Jonathan D. Denlinger Daniel Campbell B. Andrei Bernevig Alessandra Lanzara Johnpierre Paglione Crystalline symmetry-protected non-trivial topology in prototype compound BaAl4
description	Abstract The BaAl4 prototype crystal structure is the most populous of all structure types, and is the building block for a diverse set of sub-structures including the famous ThCr2Si2 family that hosts high-temperature superconductivity and numerous magnetic and strongly correlated electron systems. The MA4 family of materials (M = Sr, Ba, Eu; A = Al, Ga, In) themselves present an intriguing set of ground states including charge and spin orders, but have largely been considered as uninteresting metals. We predict the exemplary compound BaAl4 to harbor a three-dimensional Dirac spectrum with non-trivial topology and possible nodal lines crossing the Brillouin zone, wherein one pair of semi-Dirac points with linear dispersion along the k z direction and quadratic dispersion along the k x /k y direction resides on the rotational axis with C 4v point group symmetry. An extremely large, unsaturating positive magnetoresistance in BaAl4 despite an uncompensated band structure is revealed, and quantum oscillations and angle-resolved photoemission spectroscopy measurements confirm the predicted multiband semimetal structure with pockets of Dirac holes and a Van Hove singularity (VHS) remarkably consistent with the theoretical prediction. We thus present BaAl4 as a topological semimetal, casting its prototype status into a role as a building block for a vast array of topological materials.
format	article
author	Kefeng Wang Ryo Mori Zhijun Wang Limin Wang Jonathan Han Son Ma Drew W. Latzke David E. Graf Jonathan D. Denlinger Daniel Campbell B. Andrei Bernevig Alessandra Lanzara Johnpierre Paglione
author_facet	Kefeng Wang Ryo Mori Zhijun Wang Limin Wang Jonathan Han Son Ma Drew W. Latzke David E. Graf Jonathan D. Denlinger Daniel Campbell B. Andrei Bernevig Alessandra Lanzara Johnpierre Paglione
author_sort	Kefeng Wang
title	Crystalline symmetry-protected non-trivial topology in prototype compound BaAl4
title_short	Crystalline symmetry-protected non-trivial topology in prototype compound BaAl4
title_full	Crystalline symmetry-protected non-trivial topology in prototype compound BaAl4
title_fullStr	Crystalline symmetry-protected non-trivial topology in prototype compound BaAl4
title_full_unstemmed	Crystalline symmetry-protected non-trivial topology in prototype compound BaAl4
title_sort	crystalline symmetry-protected non-trivial topology in prototype compound baal4
publisher	Nature Portfolio
publishDate	2021
url	https://doaj.org/article/8a8f6a07bc2044c1b2bd52485b91a1c1
work_keys_str_mv	AT kefengwang crystallinesymmetryprotectednontrivialtopologyinprototypecompoundbaal4 AT ryomori crystallinesymmetryprotectednontrivialtopologyinprototypecompoundbaal4 AT zhijunwang crystallinesymmetryprotectednontrivialtopologyinprototypecompoundbaal4 AT liminwang crystallinesymmetryprotectednontrivialtopologyinprototypecompoundbaal4 AT jonathanhansonma crystallinesymmetryprotectednontrivialtopologyinprototypecompoundbaal4 AT drewwlatzke crystallinesymmetryprotectednontrivialtopologyinprototypecompoundbaal4 AT davidegraf crystallinesymmetryprotectednontrivialtopologyinprototypecompoundbaal4 AT jonathanddenlinger crystallinesymmetryprotectednontrivialtopologyinprototypecompoundbaal4 AT danielcampbell crystallinesymmetryprotectednontrivialtopologyinprototypecompoundbaal4 AT bandreibernevig crystallinesymmetryprotectednontrivialtopologyinprototypecompoundbaal4 AT alessandralanzara crystallinesymmetryprotectednontrivialtopologyinprototypecompoundbaal4 AT johnpierrepaglione crystallinesymmetryprotectednontrivialtopologyinprototypecompoundbaal4
_version_	1718383886498529280

Crystalline symmetry-protected non-trivial topology in prototype compound BaAl4

Ejemplares similares