Breaking of Valley Degeneracy by Magnetic Field in Monolayer MoSe2

Publikationstyp: Zeitschriftenartikel
Autor/innen: MacNeill, David; Heikes, Colin; Mak, Kin Fai; Anderson, Zackary; Kormanyos, Andor; Zólyomi, Viktor; Park, Jiwoong; Ralph, Daniel C.
Erscheinungsjahr: 2015
Erschienen in: Physical Review Letters ; 114 (2015), 3. - 037401. - ISSN 0031-9007. - eISSN 1079-7114
DOI (zitierfähiger Link): https://dx.doi.org/10.1103/PhysRevLett.114.037401
Zusammenfassung:
Using polarization-resolved photoluminescence spectroscopy, we investigate the breaking of valley degeneracy by an out-of-plane magnetic field in back-gated monolayer MoSe2 devices. We observe a linear splitting of −0.22  meV/T between luminescence peak energies in σ+ and σ− emission for both neutral and charged excitons. The optical selection rules of monolayer MoSe2 couple the photon handedness to the exciton valley degree of freedom; so this splitting demonstrates valley degeneracy breaking. In addition, we find that the luminescence handedness can be controlled with a magnetic field to a degree that depends on the back-gate voltage. An applied magnetic field, therefore, provides effective strategies for control over the valley degree of freedom.
Fachgebiet (DDC): 530 Physik
Universitätsbibliographie: Ja

Zitieren

Dateien zu dieser Ressource

Dateien Größe Format Anzeige

Zu diesem Dokument gibt es keine Dateien.

MACNEILL, David, Colin HEIKES, Kin Fai MAK, Zackary ANDERSON, Andor KORMANYOS, Viktor ZÓLYOMI, Jiwoong PARK, Daniel C. RALPH, 2015. Breaking of Valley Degeneracy by Magnetic Field in Monolayer MoSe2. In: Physical Review Letters. 114(3), 037401. ISSN 0031-9007. eISSN 1079-7114

@article{MacNeill2015Break-31056, title={Breaking of Valley Degeneracy by Magnetic Field in Monolayer MoSe2}, year={2015}, doi={10.1103/PhysRevLett.114.037401}, number={3}, volume={114}, issn={0031-9007}, journal={Physical Review Letters}, author={MacNeill, David and Heikes, Colin and Mak, Kin Fai and Anderson, Zackary and Kormanyos, Andor and Zólyomi, Viktor and Park, Jiwoong and Ralph, Daniel C.}, note={Article Number: 037401} }

Kormanyos, Andor Using polarization-resolved photoluminescence spectroscopy, we investigate the breaking of valley degeneracy by an out-of-plane magnetic field in back-gated monolayer MoSe<sub>2</sub> devices. We observe a linear splitting of −0.22  meV/T between luminescence peak energies in σ<sub>+</sub> and σ<sub>−</sub> emission for both neutral and charged excitons. The optical selection rules of monolayer MoSe<sub>2</sub> couple the photon handedness to the exciton valley degree of freedom; so this splitting demonstrates valley degeneracy breaking. In addition, we find that the luminescence handedness can be controlled with a magnetic field to a degree that depends on the back-gate voltage. An applied magnetic field, therefore, provides effective strategies for control over the valley degree of freedom. Park, Jiwoong 2015-05-29T05:45:06Z Kormanyos, Andor Zólyomi, Viktor Anderson, Zackary 2015 eng Mak, Kin Fai Heikes, Colin Breaking of Valley Degeneracy by Magnetic Field in Monolayer MoSe<sub>2</sub> MacNeill, David Zólyomi, Viktor MacNeill, David Ralph, Daniel C. Anderson, Zackary Mak, Kin Fai 2015-05-29T05:45:06Z Ralph, Daniel C. Park, Jiwoong Heikes, Colin

Das Dokument erscheint in:

KOPS Suche


Stöbern

Mein Benutzerkonto