文献类型：期刊文献

英文题名：High-Pressure Crystal Growth, Superconducting Properties, and Electronic Band Structure of Nb2P5

作者：Liu, Xiaolei[1,2,3];Yu, Zhenhai[1];Liang, Qifeng[7];Zhou, Chunyin[4];Wang, Hongyuan[1];Zhao, Jinggeng[5];Wang, Xia[1,6];Yu, Na[1,6];Zou, Zhiqiang[1,6];Guo, Yanfeng[1,8]

机构：[1]ShanghaiTech Univ, Sch Phys Sci & Technol, Shanghai 201210, Peoples R China;[2]Chinese Acad Sci, Shanghai Inst Opt & Fine Mech, Shanghai 201800, Peoples R China;[3]Univ Chinese Acad Sci, Beijing 100049, Peoples R China;[4]Chinese Acad Sci, Shanghai Adv Res Inst, Shanghai Synchrotron Radiat Facil, Shanghai 201204, Peoples R China;[5]Harbin Inst Technol, Dept Phys, Harbin 150080, Peoples R China;[6]ShanghaiTech Univ, Analyt Instrumentat Ctr, Sch Phys Sci & Technol, Shanghai 201210, Peoples R China;[7]Univ Shaoxing, Dept Phys, Shaoxing 312000, Peoples R China;[8]Chinese Acad Sci, CAS Ctr Excellence Superconducting Elect CENSE, Shanghai 200050, Peoples R China

年份：2020

卷号：32

期号：20

起止页码：8781

外文期刊名：CHEMISTRY OF MATERIALS

收录：SCI-EXPANDED(收录号：WOS:000586787900003)、、EI(收录号：20204909587482)、Scopus(收录号：2-s2.0-85097186075)、WOS

基金：The authors acknowledge the National Natural Science Foundation of China (grant nos. 11874264, 51772145), the strategic Priority Research Program of Chinese Academy of Sciences (grant no. XDA18000000), and the Key Scientific Research Projects of Higher Institutions in Henan Province (19A140018). Y.G. acknowledges the starting grant of ShanghaiTech University and the Program for Professor of Special Appointment (Shanghai Eastern Scholar). J.Z. thanks the support by the Natural Science Foundation of Heilongjiang Province (grant no. A2017004). The authors thank the support from Analytical Instrumentation Center (#SPST-AIC10112914), SPST, ShanghaiTech University.

语种：英文

外文关键词：Band structure - Calculations - Crystal growth - Crystal structure - Crystallization - Electron-phonon interactions - Niobium compounds - Shear waves - Specific heat - Superconducting materials - Surface states

外文摘要：Orthorhombic (space group: Pnma) Nb2P5 is a high-pressure phase that is quenchable to ambient pressure, which could be viewed as zigzag P8 chain-inserted NbP2. We report herein the high-pressure crystal growth of Nb2P5 and the discovery of its superconducting transition at Tc similar to 2.6 K. The electrical resistivity, magnetization, and specific heat capacity measurements on the high-quality crystal unveiled a conventional type-II weakly coupled s-wave nature of the superconductivity, with the upper critical field Hc2(0) similar to 0.5 T, the electron-phonon coupling strength.ep similar to 0.5-0.8, and the Ginzburg-Landau parameter. similar to 100. The ab initio calculations on the electronic band structure unveiled nodal-line structures protected by different symmetries. The one caused by band inversion, for example, on the G-X and U-R paths of the Brillouin zone, likely could bring nontrivial topology and hence a possible nontrivial surface state on the surface. The surface states on the (100), (010), and (110) surfaces were also calculated and discussed. The discovery of the phosphorus-rich Nb2P5 superconductor would be instructive for the design of more metal phosphide superconductors, which might host unconventional superconductivity or potential technical applications.