Observation of superconductivity in the pressurized Weyl-semimetal candidate TaIrTe4

doi:10.1103/PhysRevB.99.020503

CORC > 上海应用物理研究所 > 中国科学院上海应用物理研究所 > 中科院上海应用物理研究所2011-2017年

	Observation of superconductivity in the pressurized Weyl-semimetal candidate TaIrTe4
	Cai, S ; Emmanouilidou, E ; Guo, J ; Li, XD ; Li, YC ; Yang, K ; Li, AG ; Wu, Q ; Ni, N ; Sun, LL
刊名	PHYSICAL REVIEW B
	2019
卷号	99 期号:2 页码:—
关键词	FERMI ARCS IRON STATE PHASE DISCOVERY KELVIN METAL
ISSN号	2469-9950
DOI	10.1103/PhysRevB.99.020503
文献子类	期刊论文
英文摘要	We report the observation of superconductivity in the pressurized type-II Weyl semimetal (WSM) candidate TaIrTe4 by means of complementary high-pressure transport and synchrotron x-ray diffraction measurements. We find that TaIrTe4 shows superconductivity with transition temperature (T-C) of 0.57 K at the pressure of similar to 23.8 GPa. Then, the T-C value increases with pressure and reaches similar to 2.1 K at 65.7 GPa. In situ high-pressure Hall coefficient (R-H) measurements at low temperatures demonstrate that the positive R-H increases with pressure until the critical pressure of the superconducting transition is reached, but starts to decrease upon further increasing pressure. Above the critical pressure, the positive magnetoresistance effect disappears simultaneously. Our high-pressure x-ray diffraction measurements reveal that at around the critical pressure, the lattice of the TaIrTe4 sample is distorted and its volume is reduced by similar to 19.2 %, the value of which is predicted to result in the change of the electronic structure significantly. We propose that the pressure-induced distortion in TaIrTe4 is responsible for the change of topology of the Fermi surface, and such a change favors the emergence of superconductivity. Our results reveal the correlation among the lattice distortion, topological physics, and superconductivity in the WSM, a hot topic in condensed-matter physics.
语种	英语
内容类型	期刊论文
源URL	[http://ir.sinap.ac.cn/handle/331007/31737]
专题	上海应用物理研究所_中科院上海应用物理研究所2011-2017年
作者单位	1.Chinese Acad Sci, Inst Phys, Beijing 100190, Peoples R China; 2.Chinese Acad Sci, Beijing Natl Lab Condensed Matter Phys, Beijing 100190, Peoples R China; 3.Univ Calif Los Angeles, Dept Phys & Astron, Los Angeles, CA 90095 USA; 4.Univ Calif Los Angeles, Calif Nano Syst Inst, Los Angeles, CA 90095 USA; 5.Univ Chinese Acad Sci, Beijing 100190, Peoples R China; 6.Chinese Acad Sci, Inst High Energy Phys, Beijing 100049, Peoples R China; 7.Chinese Acad Sci, Shanghai Inst Appl Phys, Shanghai Synchrotron Radiat Facil, Shanghai 201204, Peoples R China; 8.Songshan Lake Mat Lab, Dongguan 523808, Guangdong, Peoples R China
推荐引用方式 GB/T 7714	Cai, S,Emmanouilidou, E,Guo, J,et al. Observation of superconductivity in the pressurized Weyl-semimetal candidate TaIrTe4[J]. PHYSICAL REVIEW B,2019,99(2):—.
APA	Cai, S.,Emmanouilidou, E.,Guo, J.,Li, XD.,Li, YC.,...&Sun, LL.(2019).Observation of superconductivity in the pressurized Weyl-semimetal candidate TaIrTe4.PHYSICAL REVIEW B,99(2),—.
MLA	Cai, S,et al."Observation of superconductivity in the pressurized Weyl-semimetal candidate TaIrTe4".PHYSICAL REVIEW B 99.2(2019):—.