A comprehensive study on the effects of gamma radiation on the physical properties of a two-dimensional WS2 monolayer semiconductor

被引：37

作者：

Felix, Jorlandio Francisco ^{[1
]}

da Silva, Arlon Fernandes ^{[1
]}

da Silva, Sebastiao Willam ^{[1
]}

Qu, Fanyao ^{[1
]}

Qiu, Bin ^{[2
]}

Ren, Junfeng ^{[2
]}

de Azevedo, Walter Mendes ^{[3
]}

Henini, Mohamed ^{[4
]}

Huang, Chung-Che ^{[5
]}

机构：

[1] Univ Brasilia, Inst Phys, Nucl Appl Phys, BR-70919970 Brasilia, DF, Brazil

[2] Shandong Normal Univ, Sch Phys & Elect, Jinan 250014, Peoples R China

[3] Univ Fed Pernambuco, Dept Quim Fundamental, BR-50670901 Recife, PE, Brazil

[4] Univ Nottingham, Sch Phys & Astron, Nottingham NG7 2RD, England

[5] Univ Southampton, Optoelect Res Ctr, Southampton SO17 1BJ, Hants, England

来源：

NANOSCALE HORIZONS | 2020年 / 5卷 / 02期

基金：

英国工程与自然科学研究理事会;

关键词：

TRANSITION-METAL DICHALCOGENIDES; PHOTOLUMINESCENCE;

D O I：

10.1039/c9nh00414a

中图分类号：

O64 [物理化学（理论化学）、化学物理学];

学科分类号：

070304 ; 081704 ;

摘要：

This article reports the effects of gamma radiation on the structural, optical and magnetic properties of monolayer tungsten disulfide (WS2) grown by a scalable van der Waals epitaxial (VdWE) process on a SiO2 coated Si substrate. We found that ionizing radiation (gamma ray) interacts strongly with two-dimensional WS2, which induces effective p-doping in the samples. As the radiation dose increases, the p-doping concentration increases substantially. In addition, in the small radiation dose regime, the WS2 monolayers exhibit usual diamagnetic behavior. However, a remarkable ferromagnetic hysteresis emerges when the WS2 monolayer is irradiated with 400 Gys. This is attributed to the presence of irradiation-induced complex vacancies composed of one tungsten and a pair of its nearby sulfurs. Moreover, these results have shown that the detector based on the large scale monolayer VdWE-grown two-dimensional WS2 is an appealing candidate for sensing high-energy photons at small radiation doses.

引用

页码：259 / 267

页数：9

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