Monolayer group-III monochalcogenides by oxygen functionalization: a promising class of two-dimensional topological insulators
Monolayer group-III monochalcogenides by oxygen functionalization: a promising class of two-dimensional topological insulators
复制标题
通过氧功能化的单层III族单硫属化物:一类有前途的二维拓扑绝缘体
DOI:
10.1038/s41535-018-0089-0
复制
发表时间:
2018-03
影响因子:
5.7
通讯作者:
Yugui Yao
中科院分区:
文献类型:
--
作者:
Si Zhou;Cheng-Cheng Liu;Jijun Zhao;Yugui Yao
Monolayer group-III monochalcogenides (MX, M = Ga, In; X = S, Se, Te), an emerging category of two-dimensional (2D) semiconductors, hold great promise for electronics, optoelectronics and catalysts. By first-principles calculations, we show that the phonon dispersion and Raman spectra, as well as the electronic and topological properties of monolayer MX can be tuned by oxygen functionalization. Chemisorption of oxygen atoms on one side or both sides of the MX sheet narrows or even closes the band gap, enlarges work function, and significantly reduces the carrier effective mass. More excitingly, InS, InSe, and InTe monolayers with double-side oxygen functionalization are 2D topological insulators with sizeable bulk gap up to 0.21 eV. Their low-energy bands near the Fermi level are dominated by thepxandpyorbitals of atoms, allowing band engineering via in-plane strains. Our studies provide viable strategy for realizing quantum spin Hall effect in monolayer group-III monochalcogenides at room temperature, and utilizing these novel 2D materials for high-speed and dissipationless transport devices.
登录
查看更多内容
DOI:
10.1007/978-94-017-2750-1
发表时间:
1977
期刊:
--
影响因子:
--
作者:
R. Lieth
通讯作者:
R. Lieth
影响因子:
8.6
作者:
Zhuang, Houlong L.;Hennig, Richard G.
通讯作者:
Hennig, Richard G.
影响因子:
56.9
作者:
Bernevig, B. Andrei;Hughes, Taylor L.;Zhang, Shou-Cheng
通讯作者:
Zhang, Shou-Cheng
影响因子:
21.8
作者:
Hossain, Md. Zakir;Johns, James E.;Hersam, Mark C.
通讯作者:
Hersam, Mark C.
影响因子:
4
作者:
Ya-Ping Wang;Wei-xiao Ji;Chang-wen Zhang;Ping Li;Shu-feng Zhang;Pei-ji Wang;Sheng-shi Li;Shishen Yan-Shi
通讯作者:
Ya-Ping Wang;Wei-xiao Ji;Chang-wen Zhang;Ping Li;Shu-feng Zhang;Pei-ji Wang;Sheng-shi Li;Shishen Yan-Shi