globalchange  > 气候变化与战略
DOI: 10.1016/j.scib.2020.12.007
论文题名:
Superconductivity from buckled-honeycomb-vacancy ordering
作者: Qi Y.; Ying T.; Wu X.; Dong Z.; Sasase M.; Zhang Q.; Liu W.; Ichihara M.; Ma Y.; Hu J.; Hosono H.
刊名: Science Bulletin
ISSN: 20959273
出版年: 2021
卷: 66, 期:4
起始页码: 327
结束页码: 331
语种: 英语
中文关键词: 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
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
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资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/170370
Appears in Collections:气候变化与战略

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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

Recommended Citation:
Qi Y.,Ying T.,Wu X.,et al. Superconductivity from buckled-honeycomb-vacancy ordering[J]. Science Bulletin,2021-01-01,66(4)
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