TY  - JOUR
AU  - Tu, Jhih-Sian
AU  - Borghardt, Sven
AU  - Grützmacher, Detlev
AU  - Kardynal, Beata
TI  - Experimental observation of a negative grey trion in an electron-rich WSe 2 monolayer
JO  - Journal of physics / Condensed matter
VL  - 31
IS  - 41
SN  - 0953-8984
CY  - Bristol
PB  - IOP Publ.
M1  - FZJ-2019-03612
SP  - 415701 -
PY  - 2019
AB  - We measure the evolution of low temperature photoluminescence in a WSe2 monolayer with increasing electron concentration level. By comparing non-resonant and resonant laser excitation, we find that the formation of negative trions is facilitated by very efficient phonon emission. The most prominent line in photolumienscence spectra in the intermediate range of carrier concentrations (below cm−2) is found to be 66 meV below the bright negative trion. Its measured properties, including low oscillator strength and the temperature dependence point to an interacting bright intervalley and dark intervalley trion state as the origin of the line.
LB  - PUB:(DE-HGF)16
C6  - pmid:31272091
UR  - <Go to ISI:>//WOS:000476532400001
DO  - DOI:10.1088/1361-648X/ab2f56
UR  - https://juser.fz-juelich.de/record/863600
ER  -