Pregled bibliografske jedinice broj: 1058773
Effect of lithium doping on the optical properties of monolayer MoS2
Effect of lithium doping on the optical properties of monolayer MoS2 // Applied physics letters, 112 (2018), 121902, 5 doi:10.1063/1.5021629 (međunarodna recenzija, članak, znanstveni)
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Naslov
Effect of lithium doping on the optical properties of monolayer MoS2
(Effect of lithium doping on the optical properties
of monolayer MoS2)
Autori
Saigal, Nihit ; Wielert, Isabelle ; Čapeta, Davor ; Vujičić, Nataša ; Senkovskiy, Boris V. ; Hell, Martin ; Kralj, Marko ; Grüneis, Alexander
Izvornik
Applied physics letters (0003-6951) 112
(2018);
121902, 5
Vrsta, podvrsta i kategorija rada
Radovi u časopisima, članak, znanstveni
Ključne riječi
MoS2 ; chemical doping ; Raman ; Photoluminescence ; Valleytronics
Sažetak
The effect of lithium atoms' evaporation on the surface of monolayer MoS2 grown on SiO2/Si substrate is studied using ultrahigh vacuum (∼10−11 mbar) Raman and circularly polarized photoluminescence spectroscopies, at low lithium coverage (up to ∼0.17 monolayer). With increasing Li doping, the dominant E12g and A1g Raman modes of MoS2 shift in energy and broaden. Additionally, non zone-center phonon modes become Raman active. This regards, in particular, to double resonance Raman scattering processes, involving longitudinal acoustic phonon modes at the M and K points of the Brillouin zone of MoS2 and defects. It is also accompanied by a significant decrease in the overall intensity and the degree of circular polarization of the photoluminescence spectrum. The observed changes in the optical spectra are understood as a result of electron doping by lithium atoms and disorder- activated intervalley scattering of electrons and holes in the electronic band structure of monolayer MoS2.
Izvorni jezik
Engleski
Znanstvena područja
Fizika
POVEZANOST RADA
Projekti:
IP-2016-06-3211 - Optička svojstva heterostruktura dihalkogenida prijelaznih metala (OhTMD) (Kralj, Marko, HRZZ - 2016-06) ( CroRIS)
Ustanove:
Institut za fiziku, Zagreb
Citiraj ovu publikaciju:
Časopis indeksira:
- Current Contents Connect (CCC)
- Web of Science Core Collection (WoSCC)
- Science Citation Index Expanded (SCI-EXP)
- SCI-EXP, SSCI i/ili A&HCI
- Scopus
- Nature Index
