Magnetotransmission spectroscopy was employed to study the valley Zeeman effect in large area monolayer MoS2 and MoSe2. The extracted values of the valley g factors for both A and B excitons were found to be similar with g(v) similar or equal to -4.5. The samples are expected to be strained due to the CVD growth on sapphire at high temperature (700 degrees C). However, the estimated strain, which is maximum at low temperature, is only similar or equal to 0.2%. Theoretical considerations suggest that the strain is too small to significantly influence the electronic properties. This is confirmed by the measured value of the valley g factor, and the measured temperature dependence of the band gap, which are almost identical for CVD and mechanically exfoliated MoS2.

Magnetoexcitons in large area CVD-grown monolayer MoS2 and MoSe2 on sapphire / Mitioglu, Aa; Galkowski, K; Surrente, A; Klopotowski, L; Dumcenco, D; Kis, A; Maude, Dk; Plochocka, P. - In: PHYSICAL REVIEW. B. - ISSN 2469-9950. - 93:16(2016). [10.1103/PhysRevB.93.165412]

Magnetoexcitons in large area CVD-grown monolayer MoS2 and MoSe2 on sapphire

Surrente A;
2016

Abstract

Magnetotransmission spectroscopy was employed to study the valley Zeeman effect in large area monolayer MoS2 and MoSe2. The extracted values of the valley g factors for both A and B excitons were found to be similar with g(v) similar or equal to -4.5. The samples are expected to be strained due to the CVD growth on sapphire at high temperature (700 degrees C). However, the estimated strain, which is maximum at low temperature, is only similar or equal to 0.2%. Theoretical considerations suggest that the strain is too small to significantly influence the electronic properties. This is confirmed by the measured value of the valley g factor, and the measured temperature dependence of the band gap, which are almost identical for CVD and mechanically exfoliated MoS2.
2016
Magnetotransmission spectroscopy; Phyisics; Zeeman effect
01 Pubblicazione su rivista::01a Articolo in rivista
Magnetoexcitons in large area CVD-grown monolayer MoS2 and MoSe2 on sapphire / Mitioglu, Aa; Galkowski, K; Surrente, A; Klopotowski, L; Dumcenco, D; Kis, A; Maude, Dk; Plochocka, P. - In: PHYSICAL REVIEW. B. - ISSN 2469-9950. - 93:16(2016). [10.1103/PhysRevB.93.165412]
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Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/11573/1397907
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