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Magneto photoluminescence measurements of tungsten disulphide monolayers

Kuhnert, Jan ; Rahimi-Iman, Arash ; Heimbrodt, Wolfram

Journal of physics. Condensed matter, 2017-03, Vol.29 (8), p.08LT02-08LT02 [Periódico revisado por pares]

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Título:
Magneto photoluminescence measurements of tungsten disulphide monolayers
Autor: Kuhnert, Jan ; Rahimi-Iman, Arash ; Heimbrodt, Wolfram
Assuntos: 2D materials ; factor
É parte de: Journal of physics. Condensed matter, 2017-03, Vol.29 (8), p.08LT02-08LT02
Notas: JPCM-108381.R1
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SourceType-Scholarly Journals-1
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Descrição: Layered transition-metal dichalcogenides have attracted great interest in the last few years. Thinned down to the monolayer limit they change from an indirect band structure to a direct band gap in the visible region. Due to the monolayer thickness the inversion symmetry of the crystal is broken and spin and valley are coupled to each other. The degeneracy between the two equivalent valleys, K and K′, respectively, can be lifted by applying an external magnetic field. Here, we present photoluminescence measurements of CVD-grown tungsten disulphide (WS2) monolayers at temperatures of 2 K. By applying magnetic fields up to 7 T in Faraday geometry, a splitting of the photoluminescence peaks can be observed. The magnetic field dependence of the A-exciton, the trion and three bound exciton states is discussed and the corresponding g-factors are determined.
Editor: England: IOP Publishing
Idioma: Inglês

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