中国物理B ›› 2019, Vol. 28 ›› Issue (12): 126202-126202.doi: 10.1088/1674-1056/ab50b3

• CONDENSED MATTER: STRUCTURAL, MECHANICAL, AND THERMAL PROPERTIES • 上一篇    下一篇

Structural and electrical transport properties of Dirac-like semimetal PdSn4 under high pressure

Bowen Zhang(张博文), Chao An(安超), Yonghui Zhou(周永惠), Xuliang Chen(陈绪亮), Ying Zhou(周颖), Chunhua Chen(陈春华), Yifang Yuan(袁亦方), Zhaorong Yang(杨昭荣)   

  1. 1 Anhui Province Key Laboratory of Condensed Matter Physics at Extreme Conditions, High Magnetic Field Laboratory, Chinese Academy of Sciences, Hefei 230031, China;
    2 University of Science and Technology of China, Hefei 230026, China;
    3 Institutes of Physical Science and Information Technology, Anhui University, Hefei 230601, China;
    4 Key Laboratory of Structure and Functional Regulation of Hybrid Materials(Anhui University), Ministry of Education, Hefei 230601, China;
    5 Collaborative Innovation Center of Advanced Microstructures, Nanjing 210093, China
  • 收稿日期:2019-09-16 修回日期:2019-10-21 出版日期:2019-12-05 发布日期:2019-12-05
  • 通讯作者: Chao An, Zhaorong Yang E-mail:chaoan@ahu.edu.cn;zryang@issp.ac.cn
  • 基金资助:
    Project supported by the National Key Research and Development Program of China (Grant Nos. 2018YFA0305700 and 2016YFA0401804), the National Natural Science Foundation of China (Grant Nos. U1632275, 11574323, 11874362, 11704387, and 11804344), the Natural Science Foundation of Anhui Province, China (Grant Nos. 1908085QA18, 1708085 QA19, and 1808085MA06), the Major Program of Development Foundation of Hefei Center for Physical Science and Technology, China (Grant No. 2018ZYFX002), and the Users with Excellence Project of Hefei Science Center of the Chinese Academy of Sciences (Grant No. 2018HSC-UE012).

Structural and electrical transport properties of Dirac-like semimetal PdSn4 under high pressure

Bowen Zhang(张博文)1,2, Chao An(安超)3,4, Yonghui Zhou(周永惠)1, Xuliang Chen(陈绪亮)1, Ying Zhou(周颖)3, Chunhua Chen(陈春华)1,2, Yifang Yuan(袁亦方)1,2, Zhaorong Yang(杨昭荣)1,3,5   

  1. 1 Anhui Province Key Laboratory of Condensed Matter Physics at Extreme Conditions, High Magnetic Field Laboratory, Chinese Academy of Sciences, Hefei 230031, China;
    2 University of Science and Technology of China, Hefei 230026, China;
    3 Institutes of Physical Science and Information Technology, Anhui University, Hefei 230601, China;
    4 Key Laboratory of Structure and Functional Regulation of Hybrid Materials(Anhui University), Ministry of Education, Hefei 230601, China;
    5 Collaborative Innovation Center of Advanced Microstructures, Nanjing 210093, China
  • Received:2019-09-16 Revised:2019-10-21 Online:2019-12-05 Published:2019-12-05
  • Contact: Chao An, Zhaorong Yang E-mail:chaoan@ahu.edu.cn;zryang@issp.ac.cn
  • Supported by:
    Project supported by the National Key Research and Development Program of China (Grant Nos. 2018YFA0305700 and 2016YFA0401804), the National Natural Science Foundation of China (Grant Nos. U1632275, 11574323, 11874362, 11704387, and 11804344), the Natural Science Foundation of Anhui Province, China (Grant Nos. 1908085QA18, 1708085 QA19, and 1808085MA06), the Major Program of Development Foundation of Hefei Center for Physical Science and Technology, China (Grant No. 2018ZYFX002), and the Users with Excellence Project of Hefei Science Center of the Chinese Academy of Sciences (Grant No. 2018HSC-UE012).

摘要: We conducted in-situ high-pressure synchrotron x-ray diffraction (XRD) and electrical transport measurements on Dirac-like semimetal PdSn4 in diamond anvil cells with quasi-hydrostatic pressure condition up to 44.5 GPa-52.0 GPa. The XRD data show that the ambient orthorhombic phase (Ccca) is stable with pressures to 44.5 GPa, and the lattice parameters and unit-cell volume decrease monotonously upon compression. The temperature dependence of the resistance exhibits a metallic conduction and follows a Fermi-liquid behavior below 50 K, both of which keep unchanged upon compression to 52.0 GPa. The magnetoresistance curve at 5 K maintains a linear feature in a magnetic field range of 2.5 T-7 T with increasing pressure to 20.0 GPa. Our results may provide pressure-transport constraints on the robustness of the Dirac fermions.

关键词: high pressure, Dirac-like semimetal, crystal structure, electrical transport

Abstract: We conducted in-situ high-pressure synchrotron x-ray diffraction (XRD) and electrical transport measurements on Dirac-like semimetal PdSn4 in diamond anvil cells with quasi-hydrostatic pressure condition up to 44.5 GPa-52.0 GPa. The XRD data show that the ambient orthorhombic phase (Ccca) is stable with pressures to 44.5 GPa, and the lattice parameters and unit-cell volume decrease monotonously upon compression. The temperature dependence of the resistance exhibits a metallic conduction and follows a Fermi-liquid behavior below 50 K, both of which keep unchanged upon compression to 52.0 GPa. The magnetoresistance curve at 5 K maintains a linear feature in a magnetic field range of 2.5 T-7 T with increasing pressure to 20.0 GPa. Our results may provide pressure-transport constraints on the robustness of the Dirac fermions.

Key words: high pressure, Dirac-like semimetal, crystal structure, electrical transport

中图分类号:  (High-pressure effects in solids and liquids)

  • 62.50.-p
61.05.C- (X-ray diffraction and scattering) 72.15.-v (Electronic conduction in metals and alloys) 74.62.Fj (Effects of pressure)