Precise and reversible band gap tuning in single-layer MoSe2 by uniaxial strain

Nanoscale
Joshua O IslandAndres Castellanos-Gomez

Abstract

We present photoluminescence (PL) spectroscopy measurements of single-layer MoSe2 as a function of uniform uniaxial strain. A simple clamping and bending method is described that allows for application of uniaxial strain to layered, 2D materials with strains up to 1.1% without slippage. Using this technique, we find that the electronic band gap of single layer MoSe2 can be reversibly tuned by -27 ± 2 meV per percent of strain. This is in agreement with our density-functional theory calculations, which estimate a modulation of -32 meV per percent of strain, taking into account the role of deformation of the underlying substrate upon bending. Finally, due to its narrow PL spectra as compared with that of MoS2, we show that MoSe2 provides a more precise determination of small changes in strain making it the ideal 2D material for strain applications.

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Citations

Dec 17, 2016·Physical Chemistry Chemical Physics : PCCP·Leonardo Medrano SandonasGianaurelio Cuniberti
Oct 25, 2017·Journal of Physics. Condensed Matter : an Institute of Physics Journal·F IyikanatH Sahin
Nov 9, 2017·Journal of Physics. Condensed Matter : an Institute of Physics Journal·Imen Ben AmaraSihem Jaziri
Aug 31, 2018·Physical Chemistry Chemical Physics : PCCP·Soohyun ChoSeung Ryong Park
Sep 2, 2019·Journal of Molecular Modeling·Rafael de Alencar RochaLuiz Antonio Ribeiro
Sep 18, 2020·Faraday Discussions·S Di SabatinoP Romaniello
Jan 6, 2018·Physical Chemistry Chemical Physics : PCCP·Xin WeiDigby D Macdonald
Nov 21, 2019·Physical Chemistry Chemical Physics : PCCP·Maja FeierabendErmin Malic
Feb 1, 2020·Physical Review Letters·You ZhouHongkun Park
Mar 4, 2020·Nature Communications·Zhiwei LiYuan Liu
Dec 11, 2019·Science Advances·Edoardo BaldiniMajed Chergui
Oct 15, 2019·Physical Chemistry Chemical Physics : PCCP·Liujian QiQing Jiang
Nov 25, 2017·Journal of Physics. Condensed Matter : an Institute of Physics Journal·Imen Ben AmaraSihem Jaziri
Oct 27, 2020·Advanced Science·Qinghua ZhaoAndres Castellanos-Gomez
Mar 11, 2021·Nano Letters·Leo YuTony F Heinz
Mar 13, 2021·Scientific Reports·Randy M SterbentzJoshua O Island
Mar 16, 2021·Nano Letters·Hongchao XieKin Fai Mak
Feb 2, 2018·Nano Letters·Iris NiehuesRudolf Bratschitsch
Dec 31, 2019·The Journal of Physical Chemistry Letters·Xinpeng FuYongqiang Ning
Feb 27, 2018·ACS Nano·Amey AptePulickel M Ajayan
Jul 9, 2020·ACS Nano·Jaydeep JoshiPatrick M Vora
Sep 6, 2019·Nano Letters·Oliver IffChristian Schneider
Sep 17, 2021·Physical Chemistry Chemical Physics : PCCP·Mohamed A HelalMohamed M Fadlallah

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