气候变化领域集成服务门户(CCPortal): Superconductivity from buckled-honeycomb-vacancy ordering

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DOI	10.1016/j.scib.2020.12.007
	Superconductivity from buckled-honeycomb-vacancy ordering
	Qi Y.; Ying T.; Wu X.; Dong Z.; Sasase M.; Zhang Q.; Liu W.; Ichihara M.; Ma Y.; Hu J.; Hosono H.
发表日期	2021
ISSN	20959273
起始页码	327
结束页码	331
卷号	66 期号:4
英文摘要	Vacancies are prevalent and versatile in solid-state physics and materials science. The role of vacancies in strongly correlated materials, however, remains uncultivated until now. Here, we report the discovery of an unprecedented vacancy state forming an extended buckled-honeycomb-vacancy (BHV) ordering in Ir16Sb18. Superconductivity emerges by suppressing the BHV ordering through squeezing of extra Ir atoms into the vacancies or isovalent Rh substitution. The phase diagram on vacancy ordering reveals the superconductivity competes with the BHV ordering. Further theoretical calculations suggest that this ordering originates from a synergistic effect of the vacancy formation energy and Fermi surface nesting with a wave vector of (1/3, 1/3, 0). The buckled structure breaks the crystal inversion symmetry and can mostly suppress the density of states near the Fermi level. The peculiarities of BHV ordering highlight the importance of “correlated vacancies” and may serve as a paradigm for exploring other non-trivial excitations and quantum criticality. © 2020 Science China Press
关键词	Iridates Phase diagram Superconductivity Vacancies
英文关键词	Antimony compounds; Crystal symmetry; Honeycomb structures; Fermi surface nesting; Inversion symmetry; Quantum criticality; Strongly correlated materials; Structure breaks; Synergistic effect; Theoretical calculations; Vacancy formation energies; Buckling
语种	英语
来源期刊	Science Bulletin
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/207536
作者单位	School of Physical Science and Technology, ShanghaiTech University, Shanghai, 201210, China; Materials Research Center for Element Strategy, Tokyo Institute of Technology, Yokohama, 226-8503, Japan; Institut für Theoretische Physik und Astrophysik, Julius-Maximilians-Universität Würzburg, Würzburg, 97074, Germany; Beijing National Laboratory for Condensed Matter Physics and Institute of Physics, Chinese Academy of Sciences, Beijing, 100190, China
推荐引用方式 GB/T 7714	Qi Y.,Ying T.,Wu X.,et al. Superconductivity from buckled-honeycomb-vacancy ordering[J],2021,66(4).
APA	Qi Y..,Ying T..,Wu X..,Dong Z..,Sasase M..,...&Hosono H..(2021).Superconductivity from buckled-honeycomb-vacancy ordering.Science Bulletin,66(4).
MLA	Qi Y.,et al."Superconductivity from buckled-honeycomb-vacancy ordering".Science Bulletin 66.4(2021).