Pressure induced superconductivity in the antiferromagnetic Dirac material BaMnBi2

Abstract The so-called Dirac materials such as graphene and topological insulators are a new class of matter different from conventional metals and (doped) semiconductors. Superconductivity induced by doing or applying pressure in these systems may be unconventional, or host mysterious Majorana ferm...

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Autores principales:	Huimin Chen, Lin Li, Qinqing Zhu, Jinhu Yang, Bin Chen, Qianhui Mao, Jianhua Du, Hangdong Wang, Minghu Fang
Formato:	article
Lenguaje:	EN
Publicado:	Nature Portfolio 2017
Materias:	Medicine R Science Q
Acceso en línea:	https://doaj.org/article/abceff1697894fda956c2e8438c54925
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spelling	oai:doaj.org-article:abceff1697894fda956c2e8438c549252021-12-02T15:05:28ZPressure induced superconductivity in the antiferromagnetic Dirac material BaMnBi210.1038/s41598-017-01967-y2045-2322https://doaj.org/article/abceff1697894fda956c2e8438c549252017-05-01T00:00:00Zhttps://doi.org/10.1038/s41598-017-01967-yhttps://doaj.org/toc/2045-2322Abstract The so-called Dirac materials such as graphene and topological insulators are a new class of matter different from conventional metals and (doped) semiconductors. Superconductivity induced by doing or applying pressure in these systems may be unconventional, or host mysterious Majorana fermions. Here, we report a successfully observation of pressure-induced superconductivity in an antiferromagnetic Dirac material BaMnBi2 with T c of ~4 K at 2.6 GPa. Both the higher upper critical field, μ 0 H c2(0) ~ 7 Tesla, and the measured current independent of T c precludes that superconductivity is ascribed to the Bi impurity. The similarity in ρ ab (B) linear behavior at high magnetic fields measured at 2 K both at ambient pressure (non-superconductivity) and 2.6 GPa (superconductivity, but at the normal state), as well as the smooth and similar change of resistivity with pressure measured at 7 K and 300 K in zero field, suggests that there may be no structure transition occurred below 2.6 GPa, and superconductivity observed here may emerge in the same phase with Dirac fermions. Our findings imply that BaMnBi2 may provide another platform for studying SC mechanism in the system with Dirac fermions.Huimin ChenLin LiQinqing ZhuJinhu YangBin ChenQianhui MaoJianhua DuHangdong WangMinghu FangNature PortfolioarticleMedicineRScienceQENScientific Reports, Vol 7, Iss 1, Pp 1-7 (2017)
institution	DOAJ
collection	DOAJ
language	EN
topic	Medicine R Science Q
spellingShingle	Medicine R Science Q Huimin Chen Lin Li Qinqing Zhu Jinhu Yang Bin Chen Qianhui Mao Jianhua Du Hangdong Wang Minghu Fang Pressure induced superconductivity in the antiferromagnetic Dirac material BaMnBi2
description	Abstract The so-called Dirac materials such as graphene and topological insulators are a new class of matter different from conventional metals and (doped) semiconductors. Superconductivity induced by doing or applying pressure in these systems may be unconventional, or host mysterious Majorana fermions. Here, we report a successfully observation of pressure-induced superconductivity in an antiferromagnetic Dirac material BaMnBi2 with T c of ~4 K at 2.6 GPa. Both the higher upper critical field, μ 0 H c2(0) ~ 7 Tesla, and the measured current independent of T c precludes that superconductivity is ascribed to the Bi impurity. The similarity in ρ ab (B) linear behavior at high magnetic fields measured at 2 K both at ambient pressure (non-superconductivity) and 2.6 GPa (superconductivity, but at the normal state), as well as the smooth and similar change of resistivity with pressure measured at 7 K and 300 K in zero field, suggests that there may be no structure transition occurred below 2.6 GPa, and superconductivity observed here may emerge in the same phase with Dirac fermions. Our findings imply that BaMnBi2 may provide another platform for studying SC mechanism in the system with Dirac fermions.
format	article
author	Huimin Chen Lin Li Qinqing Zhu Jinhu Yang Bin Chen Qianhui Mao Jianhua Du Hangdong Wang Minghu Fang
author_facet	Huimin Chen Lin Li Qinqing Zhu Jinhu Yang Bin Chen Qianhui Mao Jianhua Du Hangdong Wang Minghu Fang
author_sort	Huimin Chen
title	Pressure induced superconductivity in the antiferromagnetic Dirac material BaMnBi2
title_short	Pressure induced superconductivity in the antiferromagnetic Dirac material BaMnBi2
title_full	Pressure induced superconductivity in the antiferromagnetic Dirac material BaMnBi2
title_fullStr	Pressure induced superconductivity in the antiferromagnetic Dirac material BaMnBi2
title_full_unstemmed	Pressure induced superconductivity in the antiferromagnetic Dirac material BaMnBi2
title_sort	pressure induced superconductivity in the antiferromagnetic dirac material bamnbi2
publisher	Nature Portfolio
publishDate	2017
url	https://doaj.org/article/abceff1697894fda956c2e8438c54925
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_version_	1718388851997671424

Pressure induced superconductivity in the antiferromagnetic Dirac material BaMnBi2

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