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Interactions and Magnetotransport through Spin-Valley Coupled Landau Levels in Monolayer MoS<sub>2</sub>

Interactions and Magnetotransport through Spin-Valley Coupled Landau Levels in Monolayer MoS2

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PISONI, Riccardo, Andor KORMÁNYOS, Matthew BROOKS, Zijin LEI, Patrick BACK, Marius EICH, Hiske OVERWEG, Yongjin LEE, Peter RICKHAUS, Guido BURKARD, 2018. Interactions and Magnetotransport through Spin-Valley Coupled Landau Levels in Monolayer MoS2. In: Physical Review Letters. 121(24), 247701. ISSN 0031-9007. eISSN 1079-7114. Available under: doi: 10.1103/PhysRevLett.121.247701

@article{Pisoni2018Inter-45126, title={Interactions and Magnetotransport through Spin-Valley Coupled Landau Levels in Monolayer MoS2}, year={2018}, doi={10.1103/PhysRevLett.121.247701}, number={24}, volume={121}, issn={0031-9007}, journal={Physical Review Letters}, author={Pisoni, Riccardo and Kormányos, Andor and Brooks, Matthew and Lei, Zijin and Back, Patrick and Eich, Marius and Overweg, Hiske and Lee, Yongjin and Rickhaus, Peter and Burkard, Guido}, note={Article Number: 247701} }

Kormányos, Andor 2019-02-20T13:31:30Z Lee, Yongjin Overweg, Hiske Eich, Marius Brooks, Matthew Lei, Zijin Burkard, Guido Eich, Marius Interactions and Magnetotransport through Spin-Valley Coupled Landau Levels in Monolayer MoS<sub>2</sub> Rickhaus, Peter 2018 Pisoni, Riccardo Overweg, Hiske eng Rickhaus, Peter Pisoni, Riccardo 2019-02-20T13:31:30Z Brooks, Matthew Burkard, Guido Back, Patrick Kormányos, Andor Lei, Zijin The strong spin-orbit coupling and the broken inversion symmetry in monolayer transition metal dichalcogenides results in spin-valley coupled band structures. Such a band structure leads to novel applications in the fields of electronics and optoelectronics. Density functional theory calculations as well as optical experiments have focused on spin-valley coupling in the valence band. Here we present magnetotransport experiments on high-quality n-type monolayer molybdenum disulphide (MoS<sub>2</sub>) samples, displaying highly resolved Shubnikov–de Haas oscillations at magnetic fields as low as 2 T. We find the effective mass 0.7m<sub>e</sub>, about twice as large as theoretically predicted and almost independent of magnetic field and carrier density. We further detect the occupation of the second spin-orbit split band at an energy of about 15 meV, i.e., about a factor of 5 larger than predicted. In addition, we demonstrate an intricate Landau level spectrum arising from a complex interplay between a density-dependent Zeeman splitting and spin- and valley-split Landau levels. These observations, enabled by the high electronic quality of our samples, testify to the importance of interaction effects in the conduction band of monolayer MoS<sub>2</sub>. Lee, Yongjin Back, Patrick

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