Valley polarization of singlet and triplet trions in a WS(2)monolayer in magnetic fields

Kód výsledku v IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F00216208%3A11320%2F20%3A10415420" target="_blank" >RIV/00216208:11320/20:10415420 - isvavai.cz</a>

Nalezeny alternativní kódy

RIV/00216305:26620/20:PU138189

Výsledek na webu

<a href="https://verso.is.cuni.cz/pub/verso.fpl?fname=obd_publikace_handle&handle=g_RQhgCcz6" target="_blank" >https://verso.is.cuni.cz/pub/verso.fpl?fname=obd_publikace_handle&handle=g_RQhgCcz6</a>

DOI - Digital Object Identifier

<a href="http://dx.doi.org/10.1039/d0cp02737e" target="_blank" >10.1039/d0cp02737e</a>

Jazyk výsledku

angličtina

Název v původním jazyce

Valley polarization of singlet and triplet trions in a WS(2)monolayer in magnetic fields

Popis výsledku v původním jazyce

The spectral signatures associated with different negatively charged exciton complexes (trions) in a WS(2)monolayer encapsulated in hBN are analyzed from low temperature and polarization resolved reflectance contrast (RC) and photoluminescence (PL) experiments, with an applied magnetic field. Based on results obtained from the RC experiment, we show that the valley Zeeman effect affects the optical response of both the singlet and the triplet trion species through the evolution of their energy and of their relative intensity, when applying an external magnetic field. Our analysis allows us to estimate a free electron concentration of similar to 1.3 x 10(11)cm(-2). The observed evolutions based on PL experiments on the same sample are different and can hardly be understood within the same simple frame, highlighting the complexity of relaxation processes involved in the PL response.

Název v anglickém jazyce

Valley polarization of singlet and triplet trions in a WS(2)monolayer in magnetic fields

Popis výsledku anglicky

The spectral signatures associated with different negatively charged exciton complexes (trions) in a WS(2)monolayer encapsulated in hBN are analyzed from low temperature and polarization resolved reflectance contrast (RC) and photoluminescence (PL) experiments, with an applied magnetic field. Based on results obtained from the RC experiment, we show that the valley Zeeman effect affects the optical response of both the singlet and the triplet trion species through the evolution of their energy and of their relative intensity, when applying an external magnetic field. Our analysis allows us to estimate a free electron concentration of similar to 1.3 x 10(11)cm(-2). The observed evolutions based on PL experiments on the same sample are different and can hardly be understood within the same simple frame, highlighting the complexity of relaxation processes involved in the PL response.

Druh

J_imp - Článek v periodiku v databázi Web of Science

CEP obor

—

OECD FORD obor

10302 - Condensed matter physics (including formerly solid state physics, supercond.)

Projekt

<a href="/cs/project/LQ1601" target="_blank" >LQ1601: CEITEC 2020</a><br>

Návaznosti

I - Institucionalni podpora na dlouhodoby koncepcni rozvoj vyzkumne organizace

Rok uplatnění

2020

Kód důvěrnosti údajů

S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů

Název periodika

Physical Chemistry Chemical Physics

ISSN

1463-9076

e-ISSN

—

Svazek periodika

22

Číslo periodika v rámci svazku

34

Stát vydavatele periodika

GB - Spojené království Velké Británie a Severního Irska

Počet stran výsledku

7

Strana od-do

19155-19161

Kód UT WoS článku

000567772700035

EID výsledku v databázi Scopus

2-s2.0-85090870318