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Cascade of pressure-driven phase transitions in the topological nodal-line superconductor PbTaSe2

文献类型：期刊论文

作者Murtaza, Tahir12,13; Yang, Haiyang11; Feng, Jiajia9,10; Shen, Yi7,8; Ge, Yongheng7,8; Liu, Yi13; Xu, Chunqiang9,10,13; Jiao, Wenhe13; Lv, Yaokang6; Ridley, Christopher J.5
刊名PHYSICAL REVIEW B
出版日期2022-08-02
卷号106
ISSN号2469-9950
DOI10.1103/PhysRevB.106.L060501
通讯作者Zhu, Ziming(zimingzhu@hunnu.edu.cn)
英文摘要We report a succession of pressure-tuned structural transitions in the topological nodal-line superconductor PbTaSe2, evidenced from synchrotron x-ray diffraction, elastic neutron scattering, Raman spectroscopy, and electrical transport measurements up to 56 GPa, accompanied by first-principles calculations to uncover the evolution of the underlying electronic structure. In contrast to the previously proposed small shift of the Pb Wyckoff coordinate in the sub-GPa regime, our study reveals that it is rather a transition from P (6) over bar m2 (alpha phase) to P6(3)mc (beta phase), subsequently followed by a transition to P6/mmm (gamma phase) at similar to 7.5 GPa and to Pmmm (delta phase) at similar to 44 GPa. In addition, the first-principles calculations unambiguously demonstrate the multiple types of topological fermions associated with these different pressure-driven structures. Collectively, our results not only present the intriguing structural transitions in this topological PbTaSe2 superconductor, they also provide the impetus to study topological phase transitions and their physical consequences in a broader class of topological materials.
WOS研究方向Materials Science ; Physics
语种英语
出版者AMER PHYSICAL SOC
WOS记录号WOS:000842599500001
源URL[http://ir.hfcas.ac.cn:8080/handle/334002/132005]  
专题中国科学院合肥物质科学研究院
通讯作者Zhu, Ziming
作者单位1.Shanghai Univ, Mat Genome Inst, Shanghai 200444, Peoples R China
2.Changshu Inst Technol, Dept Phys, Changshu 215500, Jiangsu, Peoples R China
3.Acad Sinica, Inst Phys, Taipei 11529, Taiwan
4.Univ Edinburgh, Sch Chem, David Brewster Rd, Edinburgh EH9 3FJ, Midlothian, Scotland
5.STFC Rutherford Appleton Lab, ISIS Pulsed Neutron & Muon Source, Harwell Campus, Didcot OX11 0QX, Oxon, England
6.Zhejiang Univ Technol, Coll Chem Engn, Hangzhou 310014, Peoples R China
7.Hunan Normal Univ, Synerget Innovat Ctr Quantum Effects & Applicat, Changsha 410081, Peoples R China
8.Hunan Normal Univ, Dept Phys, Minist Educ, Key Lab Low Dimens Quantum Struct & Quantum Contr, Changsha 410081, Peoples R China
9.Southeast Univ, Minist Educ, Key Lab MEMS, Nanjing 211189, Peoples R China
10.Southeast Univ, Minist Educ, Sch Phys, Nanjing 211189, Peoples R China
推荐引用方式
GB/T 7714		 Murtaza, Tahir,Yang, Haiyang,Feng, Jiajia,et al. Cascade of pressure-driven phase transitions in the topological nodal-line superconductor PbTaSe2[J]. PHYSICAL REVIEW B,2022,106.
APA Murtaza, Tahir.,Yang, Haiyang.,Feng, Jiajia.,Shen, Yi.,Ge, Yongheng.,...&Xu, Xiaofeng.(2022).Cascade of pressure-driven phase transitions in the topological nodal-line superconductor PbTaSe2.PHYSICAL REVIEW B,106.
MLA Murtaza, Tahir,et al."Cascade of pressure-driven phase transitions in the topological nodal-line superconductor PbTaSe2".PHYSICAL REVIEW B 106(2022).

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来源：合肥物质科学研究院

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