globalchange  > 气候变化与战略
DOI: 10.1016/j.scib.2021.01.006
论文题名:
Realistic flat-band model based on degenerate p-orbitals in two-dimensional ionic materials
作者: Zeng J.; Lu M.; Liu H.; Jiang H.; Xie X.C.
刊名: Science Bulletin
ISSN: 20959273
出版年: 2021
卷: 66, 期:8
起始页码: 765
结束页码: 770
语种: 英语
中文关键词: 1T structure ; Degenerate orbitals ; Flat-band ; Material realization ; Partially filled
英文关键词: Alkali metals ; Calculations ; Chlorine compounds ; Monolayers ; Atomic crystals ; Experimental realizations ; Ferromagnetic state ; First-principles calculation ; Graphene layers ; Layered material ; Material predictions ; Theoretical modeling ; Gadolinium compounds
英文摘要: Though several theoretical models have been proposed to design electronic flat-bands, the definite experimental realization in two-dimensional atomic crystal is still lacking. Here we propose a novel and realistic flat-band model based on threefold degenerate p-orbitals in two-dimensional ionic materials. Our theoretical analysis and first-principles calculations show that the proposed flat-band can be realized in 1T layered materials of alkali-metal chalogenides and metal-carbon group compounds. Some of the former are theoretically predicted to be stable as layered materials (e.g., K2S), and some of the latter have been experimentally fabricated in previous works (e.g., Gd2CCl2). More interestingly, the flat-band is partially filled in the heterostructure of a K2S monolayer and graphene layers. The spin polarized nearly flat-band can be realized in the ferromagnetic state of a Gd2CCl2 monolayer, which has been fabricated in experiments. Our theoretical model together with the material predictions provide a realistic platform for the study of flat-bands and related exotic quantum phases. © 2021 Science China Press
Citation statistics:
资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/170491
Appears in Collections:气候变化与战略

Files in This Item:

There are no files associated with this item.


作者单位: International Center for Quantum Materials, School of Physics, Peking University, Beijing, 100871, China; Beijing Academy of Quantum Information Sciences, Beijing, 100871, China; Center for Advanced Quantum Studies, Department of Physics, Beijing Normal University, Beijing, 100875, China; School of Physical Science and Technology, Soochow University, Suzhou, 215006, China; Beijing Academy of Quantum Information Sciences, Beijing, 100193, China; CAS Center for Excellence in Topological Quantum Computation, University of Chinese Academy of Sciences, Beijing, 100871, China

Recommended Citation:
Zeng J.,Lu M.,Liu H.,et al. Realistic flat-band model based on degenerate p-orbitals in two-dimensional ionic materials[J]. Science Bulletin,2021-01-01,66(8)
Service
Recommend this item
Sava as my favorate item
Show this item's statistics
Export Endnote File
Google Scholar
Similar articles in Google Scholar
[Zeng J.]'s Articles
[Lu M.]'s Articles
[Liu H.]'s Articles
百度学术
Similar articles in Baidu Scholar
[Zeng J.]'s Articles
[Lu M.]'s Articles
[Liu H.]'s Articles
CSDL cross search
Similar articles in CSDL Cross Search
[Zeng J.]‘s Articles
[Lu M.]‘s Articles
[Liu H.]‘s Articles
Related Copyright Policies
Null
收藏/分享
所有评论 (0)
暂无评论
 

Items in IR are protected by copyright, with all rights reserved, unless otherwise indicated.