Tunable Berry curvature and transport crossover in topological Dirac semimetal KZnBi

Abstract Topological Dirac semimetals have emerged as a platform to engineer Berry curvature with time-reversal symmetry breaking, which allows to access diverse quantum states in a single material system. It is of interest to realize such diversity in Dirac semimetals that provides insight on corre...

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Autores principales:	Junseong Song, Byung Cheol Park, Kyung Ik Sim, Joonho Bang, Sunghun Kim, Zhuo Yang, Yoshimitsu Kohama, Yeongkwan Kim, Sung Wng Kim
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/31bb0c4bed2e46f0b2e9abad2513e0dd
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spelling	oai:doaj.org-article:31bb0c4bed2e46f0b2e9abad2513e0dd2021-12-02T19:12:34ZTunable Berry curvature and transport crossover in topological Dirac semimetal KZnBi10.1038/s41535-021-00378-72397-4648https://doaj.org/article/31bb0c4bed2e46f0b2e9abad2513e0dd2021-09-01T00:00:00Zhttps://doi.org/10.1038/s41535-021-00378-7https://doaj.org/toc/2397-4648Abstract Topological Dirac semimetals have emerged as a platform to engineer Berry curvature with time-reversal symmetry breaking, which allows to access diverse quantum states in a single material system. It is of interest to realize such diversity in Dirac semimetals that provides insight on correlation between Berry curvature and quantum transport phenomena. Here, we report the transition between anomalous Hall and chiral fermion states in three-dimensional topological Dirac semimetal KZnBi, which is demonstrated by tuning the direction and flux of Berry curvature. Angle-dependent magneto-transport measurements show that both anomalous Hall resistance and positive magnetoresistance are maximized at 0° between net Berry curvature and rotational axis. We find that the unexpected crossover of anomalous Hall resistance and negative magnetoresistance suddenly occurs when the angle reaches to ~70°, indicating that Berry curvature strongly correlates with quantum transports of Dirac and chiral fermions. It would be interesting to tune Berry curvature within other quantum phases such as topological superconductivity.Junseong SongByung Cheol ParkKyung Ik SimJoonho BangSunghun KimZhuo YangYoshimitsu KohamaYeongkwan KimSung Wng KimNature PortfolioarticleMaterials of engineering and construction. Mechanics of materialsTA401-492Atomic physics. Constitution and properties of matterQC170-197ENnpj Quantum Materials, Vol 6, Iss 1, Pp 1-6 (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 Junseong Song Byung Cheol Park Kyung Ik Sim Joonho Bang Sunghun Kim Zhuo Yang Yoshimitsu Kohama Yeongkwan Kim Sung Wng Kim Tunable Berry curvature and transport crossover in topological Dirac semimetal KZnBi
description	Abstract Topological Dirac semimetals have emerged as a platform to engineer Berry curvature with time-reversal symmetry breaking, which allows to access diverse quantum states in a single material system. It is of interest to realize such diversity in Dirac semimetals that provides insight on correlation between Berry curvature and quantum transport phenomena. Here, we report the transition between anomalous Hall and chiral fermion states in three-dimensional topological Dirac semimetal KZnBi, which is demonstrated by tuning the direction and flux of Berry curvature. Angle-dependent magneto-transport measurements show that both anomalous Hall resistance and positive magnetoresistance are maximized at 0° between net Berry curvature and rotational axis. We find that the unexpected crossover of anomalous Hall resistance and negative magnetoresistance suddenly occurs when the angle reaches to ~70°, indicating that Berry curvature strongly correlates with quantum transports of Dirac and chiral fermions. It would be interesting to tune Berry curvature within other quantum phases such as topological superconductivity.
format	article
author	Junseong Song Byung Cheol Park Kyung Ik Sim Joonho Bang Sunghun Kim Zhuo Yang Yoshimitsu Kohama Yeongkwan Kim Sung Wng Kim
author_facet	Junseong Song Byung Cheol Park Kyung Ik Sim Joonho Bang Sunghun Kim Zhuo Yang Yoshimitsu Kohama Yeongkwan Kim Sung Wng Kim
author_sort	Junseong Song
title	Tunable Berry curvature and transport crossover in topological Dirac semimetal KZnBi
title_short	Tunable Berry curvature and transport crossover in topological Dirac semimetal KZnBi
title_full	Tunable Berry curvature and transport crossover in topological Dirac semimetal KZnBi
title_fullStr	Tunable Berry curvature and transport crossover in topological Dirac semimetal KZnBi
title_full_unstemmed	Tunable Berry curvature and transport crossover in topological Dirac semimetal KZnBi
title_sort	tunable berry curvature and transport crossover in topological dirac semimetal kznbi
publisher	Nature Portfolio
publishDate	2021
url	https://doaj.org/article/31bb0c4bed2e46f0b2e9abad2513e0dd
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_version_	1718377013986721792

Tunable Berry curvature and transport crossover in topological Dirac semimetal KZnBi

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