文献详情
Unusual Electronic States and Superconducting Proximity Effect of Bi Films Modulated by a NbSe2 Substrate
文献类型：期刊
期刊名称：ACS nano影响因子和分区
年：2019
卷：13
期：2
页码：1885-1892
ISSN：1936-086X
关键词：covalent-like quasi-bonds,density functional theory calculations,few-layer bismuth (110),proximity effect,scanning tunneling microscopy,thickness dependence,two-dimensional heterostructures
所属部门：物理学系
摘要：Heterostructures of two-dimensional layered materials can be functionalized with exotic phenomena that are unpresented with each constituting component. The interface effect plays a key role in determining the electronic properties of the heterostructure, whose characterization requires a correlation with the morphology with atomic-scale precision. Here, we report an investigation on the electronic properties of few-layer Bi(110) films mediated by a NbSe2 substrate. By utilizing scanning tunneli ...More
Heterostructures of two-dimensional layered materials can be functionalized with exotic phenomena that are unpresented with each constituting component. The interface effect plays a key role in determining the electronic properties of the heterostructure, whose characterization requires a correlation with the morphology with atomic-scale precision. Here, we report an investigation on the electronic properties of few-layer Bi(110) films mediated by a NbSe2 substrate. By utilizing scanning tunneling microscopy and spectroscopy, we show a significant variation of the density of states at different Bi film thicknesses, resulting in an unusual superconducting proximity effect that deviates from the conventional monotonous decay behavior. Moreover, the electronic states of the Bi films are also prominently modulated by the Moiré pattern spatially. With first-principles calculations, we illuminate these findings as the results of covalent-like quasi-bonds formed at the Bi/NbSe2 interface, which profoundly alter the charge distributions in the Bi films. Our study indicates a viable way of modulating the electronic properties of ultrathin films by quasi-covalent interfacial couplings beyond conventional van der Waals interactions. ...Hide

DOI：10.1021/acsnano.8b08051
百度学术：Unusual Electronic States and Superconducting Proximity Effect of Bi Films Modulated by a NbSe2 Substrate
语言：外文
作者其他论文



Charge-governed phase manipulation of few-layer tellurium.Wang Cong, Zhou Xieyu, Qiao Jingsi, et al. .Nanoscale. 2018.
Direct Vapor Growth of 2D Vertical Heterostructures with Tunable Band Alignments and Interfacial Charge Transfer Behaviors.Zheng Weihao, Zheng Biyuan, Yan Changlin, et al. .Advanced science (Weinheim, Baden-Wurttemberg, Germany). 2019, 6(7), 1802204.
Wet Chemical Method for Black Phosphorus Thinning and Passivation.Fan Shuangqing, Qiao JingSi, Lai Jiawei, et al. .ACS applied materials & interfaces. 2019, 11(9), 9213-9222.
Interfacial water intercalation-induced metal-insulator transition in NbS2/BN heterostructure.Xu Rui, Wang Xinsheng, Zheng Zhiyue, et al. .Nanotechnology. 2019, 30(20), 205702.
Engineering Point-Defect States in Monolayer WSe2.Zhang Chendong, Wang Cong, Yang Feng, et al. .ACS nano. 2019, 13(2), 1595-1602.