Valley polarization in MoS2 monolayers by optical pumping

Details Valley polarization in MoS2 monolayers by optical pumping Valley polarization in MoS2 monolayers by optical pumping

2012-02-08

arxiv.org/abs/1202.1592v1

Physics

Condensed Matter

Mesoscale and Nanoscale Physics

Scientific paper

We report experimental evidences on selective occupation of the degenerate valleys in MoS2 monolayers by circularly polarized optical pumping. Over 30% valley polarization has been observed at K and K' valley via the polarization resolved luminescence spectra on pristine MoS2 monolayers. It demonstrates one viable way to generate and detect valley polarization towards the conceptual valleytronics applications with information carried by the valley index.

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