Long-Lived Hole Spin/Valley Polarization Probed by Kerr Rotation in Monolayer WSe2.
Nano Lett
; 16(8): 5010-4, 2016 08 10.
Article
em En
| MEDLINE
| ID: mdl-27466727
ABSTRACT
Time-resolved Kerr rotation and photoluminescence measurements are performed on MOCVD-grown monolayer tungsten diselenide (WSe2). We observe a surprisingly long-lived Kerr rotation signal (â¼80 ns) at 10 K, which is attributed to spin/valley polarization of the resident holes. This polarization is robust to transverse magnetic field (up to 0.3 T). Wavelength-dependent measurements reveal that only excitation near the free exciton energy generates this long-lived spin/valley polarization.
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MEDLINE
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En
Ano de publicação:
2016
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Article