Flipping exciton angular momentum with chiral phonons in MoSe2/WSe2 heterobilayers
The result's identifiers
Result code in IS VaVaI
<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F00216208%3A11320%2F20%3A10414734" target="_blank" >RIV/00216208:11320/20:10414734 - isvavai.cz</a>
Result on the web
<a href="https://verso.is.cuni.cz/pub/verso.fpl?fname=obd_publikace_handle&handle=et0XIPJi2X" target="_blank" >https://verso.is.cuni.cz/pub/verso.fpl?fname=obd_publikace_handle&handle=et0XIPJi2X</a>
DOI - Digital Object Identifier
<a href="http://dx.doi.org/10.1088/2053-1583/aba567" target="_blank" >10.1088/2053-1583/aba567</a>
Alternative languages
Result language
angličtina
Original language name
Flipping exciton angular momentum with chiral phonons in MoSe2/WSe2 heterobilayers
Original language description
Optical selection rules in monolayers of transition metal dichalcogenides and of their heterostructures are determined by the conservation of the z-component of the total angular momentum-J(Z)= L-Z+S-Z - associated with the C-3 rotational lattice symmetry which assumes half integer values corresponding, modulo 3, to distinct states. Here we show, based on polarization resolved and low temperature magneto-optical spectroscopy experiments, that the conservation of the total angular momentum in these systems leads to a very efficient exciton-phonon interaction when the coupling is mediated through chiral phonons. We identify these phonons as the Gamma point E" modes which despite carrying angular momentum +/- 1 are able to induce an excitonic spin-flip of -/+ 2 thanks to the C(3)symmetry. These experiments reveal the crucial role of electron-phonon interaction in the carrier dynamics of group 6 transition metal dichalcogenides.
Czech name
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Czech description
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Classification
Type
J<sub>imp</sub> - Article in a specialist periodical, which is included in the Web of Science database
CEP classification
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OECD FORD branch
10302 - Condensed matter physics (including formerly solid state physics, supercond.)
Result continuities
Project
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Continuities
I - Institucionalni podpora na dlouhodoby koncepcni rozvoj vyzkumne organizace
Others
Publication year
2020
Confidentiality
S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů
Data specific for result type
Name of the periodical
2D Materials [online]
ISSN
2053-1583
e-ISSN
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Volume of the periodical
7
Issue of the periodical within the volume
4
Country of publishing house
GB - UNITED KINGDOM
Number of pages
7
Pages from-to
041002
UT code for WoS article
000563243400001
EID of the result in the Scopus database
2-s2.0-85092780997