Observation of Ultrafast Free Carrier Dynamics in Single Layer MoS2

Nano Letters
Antonija Grubišić ČaboSøren Ulstrup

Abstract

The dynamics of excited electrons and holes in single layer (SL) MoS2 have so far been difficult to disentangle from the excitons that dominate the optical response of this material. Here, we use time- and angle-resolved photoemission spectroscopy for a SL of MoS2 on a metallic substrate to directly measure the excited free carriers. This allows us to ascertain a direct quasiparticle band gap of 1.95 eV and determine an ultrafast (50 fs) extraction of excited free carriers via the metal in contact with the SL MoS2. This process is of key importance for optoelectronic applications that rely on separated free carriers rather than excitons.

References

Mar 17, 2010·Nano Letters·Andrea SplendianiFeng Wang
Jan 15, 2011·Physical Review Letters·Kin Fai MakTony F Heinz
Feb 1, 2011·Nature Nanotechnology·B RadisavljevicA Kis
Oct 15, 2011·Optics Express·Fabio FrassettoLuca Poletto
Jun 19, 2012·Nature Nanotechnology·Kin Fai MakTony F Heinz
Jun 19, 2012·Nature Nanotechnology·Hualing ZengXiaodong Cui
Jul 31, 2013·Physical Review Letters·Jens Christian JohannsenPhilip Hofmann
Oct 8, 2013·Nature Materials·Isabella GierzAndrea Cavalleri
Dec 10, 2013·Physical Review Letters·Diana Y QiuSteven G Louie
Feb 4, 2014·ACS Nano·Stephen McDonnellChristopher L Hinkle
Aug 26, 2014·Nature Nanotechnology·Xiaoping HongFeng Wang
Feb 14, 2015·Physical Review Letters·Jill A MiwaPhilip Hofmann
Aug 27, 2015·Langmuir : the ACS Journal of Surfaces and Colloids·Signe S GrønborgJill A Miwa

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Citations

Jun 9, 2016·ACS Nano·Søren UlstrupPhilip Hofmann
May 17, 2017·Nano Letters·Alyssa J McKennaDavid J Flannigan
Feb 23, 2017·Advanced Materials·Xiaofeng LiuJianrong Qiu
Aug 20, 2016·Nature Communications·Hailong ChenJunrong Zheng
Feb 26, 2016·Nature Communications·Soonyoung ChaHyunyong Choi
Aug 3, 2018·The Review of Scientific Instruments·Jeremy A CurtisDavid J Hilton
Oct 13, 2018·Physical Review Letters·Philipp EickholtMarkus Donath
Apr 28, 2018·Nanomaterials·Mattia Cattelan, Neil A Fox
Jul 20, 2019·Physical Review Letters·Fang LiuXiaoyang Zhu
May 25, 2016·Nanoscale·Frank CeballosHui Zhao
Mar 6, 2019·The Review of Scientific Instruments·Jan Heye BussRobert A Kaindl
Jul 25, 2019·Nature Communications·Søren UlstrupPhilip Hofmann
Jun 10, 2020·Proceedings of the National Academy of Sciences of the United States of America·Zhaodong ChuKeji Lai
Sep 8, 2016·Advanced Materials·Bong Gyu ShinYoung Hee Lee
Feb 12, 2021·The Journal of Physical Chemistry Letters·Fabio Caruso
Dec 22, 2020·Chemical Reviews·Phil D C KingGiancarlo Panaccione
May 6, 2021·Journal of Physics. Condensed Matter : an Institute of Physics Journal·James Lloyd-HughesFrank A Hegmann
Dec 12, 2017·ACS Nano·Paul D CunninghamBerend T Jonker
Sep 28, 2018·ACS Applied Nano Materials·Wonjae KimMika Prunnila
Aug 17, 2019·The Journal of Physical Chemistry. a·Xiao-Ying XieGanglong Cui
Nov 22, 2018·The Journal of Physical Chemistry. a·Xiang-Yang LiuGanglong Cui
Nov 19, 2021·Physical Chemistry Chemical Physics : PCCP·Henriette E LundPhilip Hofmann

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