Pressure-induced superconductivity and topological phase transitions in the topological nodal-line semimetal SrAs3
文献类型：期刊论文
| 作者 | Cheng, Erjian; Xia, Wei; Shi, Xianbiao; Yu, Zhenhai; Wang, Lin; Yan, Limin; Peets, Darren C.; Zhu, Chuchu; Su, Hao; Zhang, Yong |
| 刊名 | NPJ QUANTUM MATERIALS
 |
| 出版日期 | 2020 |
| 卷号 | 5期号:1 |
| 关键词 | CRYSTALLINE INSULATOR CRITICAL FIELD SCHEMES SURFACE STATES |
| DOI | 10.1038/s41535-020-0240-6 |
| 英文摘要 | Topological nodal-line semimetals (TNLSMs) are materials whose conduction and valence bands cross each other, meeting a topologically protected closed loop rather than discrete points in the Brillouin zone (BZ). The anticipated properties for TNLSMs, include drumhead-like nearly flat surface states, unique Landau energy levels, special collective modes, long-range Coulomb interactions, or the possibility of realizing high-temperature superconductivity. Recently, SrAs(3)has been theoretically proposed and then experimentally confirmed to be a TNLSM. Here, we report high-pressure experiments on SrAs3, identifying a Lifshitz transition below 1 GPa and a superconducting transition accompanied by a structural phase transition above 20 GPa. A topological crystalline insulator (TCI) state is revealed by means of density functional theory (DFT) calculations on the emergent high-pressure phase. As the counterpart of topological insulators, TCIs possess metallic boundary states protected by crystal symmetry, rather than time reversal. In consideration of topological surface states (TSSs) and helical spin texture observed in the high-pressure state of SrAs3, the superconducting state may be induced in the surface states, and is most likely topologically nontrivial, making pressurized SrAs(3)a strong candidate for topological superconductor. |
| 学科主题 | Materials Science ; Physics |
| 源URL | [http://ir.nimte.ac.cn/handle/174433/20717]  |
| 专题 | 2020专题 2020专题_期刊论文 |
| 作者单位 | 1.Li, SY (corresponding author), Fudan Univ, Dept Phys, State Key Lab Surface Phys, Shanghai 200438, Peoples R China. 2.Li, SY (corresponding author), Fudan Univ, Lab Adv Mat, Shanghai 200438, Peoples R China. 3.Guo, YF (corresponding author), ShanghaiTech Univ, Sch Phys Sci & Technol, Shanghai 200031, Peoples R China. 4.Zhao, WW (corresponding author), Harbin Inst Technol, State Key Lab Adv Welding & Joining, Shenzhen 518055, Peoples R China. 5.Zhao, WW (corresponding author), Harbin Inst Technol, Flexible Printed Elect Technol Ctr, Shenzhen 518055, Peoples R China. 6.Zhao, WW (corresponding author), Harbin Inst Technol, Key Lab Microsyst & Microstruct Mfg, Minist Educ, Harbin 150001, Peoples R China. 7.Li, SY (corresponding author), Collaborat Innovat Ctr Adv Microstruct, Nanjing 210093, Peoples R China. |
| 推荐引用方式 GB/T 7714 | Cheng, Erjian,Xia, Wei,Shi, Xianbiao,et al. Pressure-induced superconductivity and topological phase transitions in the topological nodal-line semimetal SrAs3[J]. NPJ QUANTUM MATERIALS,2020,5(1). |
| APA | Cheng, Erjian.,Xia, Wei.,Shi, Xianbiao.,Yu, Zhenhai.,Wang, Lin.,...&Li, Shiyan.(2020).Pressure-induced superconductivity and topological phase transitions in the topological nodal-line semimetal SrAs3.NPJ QUANTUM MATERIALS,5(1). |
| MLA | Cheng, Erjian,et al."Pressure-induced superconductivity and topological phase transitions in the topological nodal-line semimetal SrAs3".NPJ QUANTUM MATERIALS 5.1(2020). |
入库方式： OAI收割
来源：宁波材料技术与工程研究所
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