Metallic conduction induced by direct anion site doping in layered SnSe2

Scientific Reports
Sang Il KimYoonchul Sohn

Abstract

The emergence of metallic conduction in layered dichalcogenide semiconductor materials by chemical doping is one of key issues for two-dimensional (2D) materials engineering. At present, doping methods for layered dichalcogenide materials have been limited to an ion intercalation between layer units or electrostatic carrier doping by electrical bias owing to the absence of appropriate substitutional dopant for increasing the carrier concentration. Here, we report the occurrence of metallic conduction in the layered dichalcogenide of SnSe2 by the direct Se-site doping with Cl as a shallow electron donor. The total carrier concentration up to ~10(20) cm(-3) is achieved by Cl substitutional doping, resulting in the improved conductivity value of ~170 S · cm(-1) from ~1.7 S · cm(-1) for non-doped SnSe2. When the carrier concentration exceeds ~10(19) cm(-3), the conduction mechanism is changed from hopping to degenerate conduction, exhibiting metal-insulator transition behavior. Detailed band structure calculation reveals that the hybridized s-p orbital from Sn 5s and Se 4p states is responsible for the degenerate metallic conduction in electron-doped SnSe2.

References

Feb 5, 2011·Science·Jonathan N ColemanValeria Nicolosi
Apr 27, 2012·Advanced Materials·Ivan KhrapachMonica F Craciun
Aug 21, 2012·Scientific Reports·Ruitao LvMauricio Terrones
Oct 13, 2012·Nature·K S NovoselovK Kim
Nov 8, 2012·Nature Nanotechnology·Qing Hua WangMichael S Strano
Dec 1, 2012·Science·J T YeY Iwasa
Jun 25, 2013·Nature Materials·Branimir Radisavljevic, Andras Kis
Aug 12, 2014·Physical Chemistry Chemical Physics : PCCP·Congxin XiaYu Jia

❮ Previous
Next ❯

Citations

Jan 28, 2018·Scientific Reports·Jin Tae KimKimoon Lee
Oct 21, 2016·Chemistry : a European Journal·Sujoy SahaKanishka Biswas
Jan 1, 2019·Nanoscale Horizons : the Home for Rapid Reports of Exceptional Significance in Nanoscience and Nanotechnolgy·Peng LuoTianyou Zhai
Dec 17, 2016·Advanced Science·Xing ZhouTianyou Zhai

❮ Previous
Next ❯

Methods Mentioned

BETA
X-ray

Software Mentioned

Vienna ab initio simulation program ( VASP )

Related Concepts

Related Feeds

Cardiac Conduction System

The cardiac conduction system is a specialized tract of myocardial cells responsible for maintaining normal cardiac rhythm. Discover the latest research on the cardiac conduction system here.

Related Papers

Physical Review. B, Condensed Matter
G TimpP N Butcher
Chemphyschem : a European Journal of Chemical Physics and Physical Chemistry
Yucheng HuangSufan Wang
© 2022 Meta ULC. All rights reserved