We have explored the benefits of performing monochromated Electron Energy Loss Spectroscopy (EELS) in samples at cryogenic temperatures. As an example, we have observed the excitonic absorption peaks in single layer Transition Metal Dichalcogenides. These peaks appear separated by small energies due to spin orbit coupling. We have been able to distinguish the split for MoS2 below 300 K and for MoSe2 below 220 K. However, the distinction between peaks is only clear at 150 K. We have measured the change in absorption threshold between 150 K and 770 K for MoS2 and MoSe2. We discuss the effect of carbon and ice contamination in EELS spectra. The increased spectral resolution available made possible with modern monochromators in electron microscopes will require the development of stable sample holders which reaches temperatures far below that of liquid nitrogen.
Skip Nav Destination
Article navigation
18 April 2016
Research Article|
April 21 2016
Electron energy loss spectroscopy of excitons in two-dimensional-semiconductors as a function of temperature
Luiz H. G. Tizei;
Luiz H. G. Tizei
a)
1Laboratoire de Physique des Solides,
Université Paris-Sud
, CNRS-UMR 8502, Orsay 91405, France
Search for other works by this author on:
Yung-Chang Lin;
Yung-Chang Lin
2Nanotube Research Center,
National Institute of Advanced Industrial Science and Technology (AIST)
, Tsukuba 305-8565, Japan
Search for other works by this author on:
Ang-Yu Lu;
Ang-Yu Lu
3Physical Science and Engineering Division,
King Abdullah University of Science and Technology
, Thuwal 23955-6900, Kingdom of Saudi Arabia
Search for other works by this author on:
Lain-Jong Li;
Lain-Jong Li
3Physical Science and Engineering Division,
King Abdullah University of Science and Technology
, Thuwal 23955-6900, Kingdom of Saudi Arabia
Search for other works by this author on:
Kazu Suenaga
Kazu Suenaga
b)
2Nanotube Research Center,
National Institute of Advanced Industrial Science and Technology (AIST)
, Tsukuba 305-8565, Japan
Search for other works by this author on:
a)
Electronic mail: luiz.galvao-tizei@u-psud.fr
b)
Electronic mail: suenaga-kazu@aist.go.jp
Appl. Phys. Lett. 108, 163107 (2016)
Article history
Received:
February 17 2016
Accepted:
April 05 2016
Citation
Luiz H. G. Tizei, Yung-Chang Lin, Ang-Yu Lu, Lain-Jong Li, Kazu Suenaga; Electron energy loss spectroscopy of excitons in two-dimensional-semiconductors as a function of temperature. Appl. Phys. Lett. 18 April 2016; 108 (16): 163107. https://doi.org/10.1063/1.4947058
Download citation file:
Pay-Per-View Access
$40.00
Sign In
You could not be signed in. Please check your credentials and make sure you have an active account and try again.
Citing articles via
Roadmap on photonic metasurfaces
Sebastian A. Schulz, Rupert. F. Oulton, et al.
Era of entropy: Synthesis, structure, properties, and applications of high-entropy materials
Christina M. Rost, Alessandro R. Mazza, et al.
Piezoelectric phononic integrated circuits
Krishna C. Balram
Related Content
Electron radiation damage mechanisms in 2D MoSe2
Appl. Phys. Lett. (January 2017)
Strain-engineering in two-dimensional transition metal dichalcogenide alloys
J. Appl. Phys. (December 2022)
Materials properties of out-of-plane heterostructures of MoS2-WSe2 and WS2-MoSe2
Appl. Phys. Lett. (February 2016)
Elucidation of luminescent mechanisms of size-controllable MoSe2 quantum dots
Appl. Phys. Lett. (August 2017)
Field-effect transistors and intrinsic mobility in ultra-thin MoSe2 layers
Appl. Phys. Lett. (November 2012)