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- W3100143410 abstract "Monolayer jacutingaite (Pt$_2$HgSe$_3$) has been recently identified as a candidate quantum spin Hall system with a 0.5 eV band gap, but no transport measurements have been performed so far on this material, neither in monolayer nor in the bulk. By using a dedicated high-pressure technique, we grow crystals enabling the exfoliation of 50-100 nm thick layers and the realization of devices for controlled transport experiments. Magnetoresistance measurements indicate that jacutingaite is a semimetal, exhibiting Shubnikov-de Haas (SdH) resistance oscillations with a multi-frequency spectrum. We adapt the Lifshitz-Kosevich formula to analyze quantitatively the SdH resistance oscillations in the presence of multiple frequencies, and find that the experimental observations are overall reproduced well by band structure ab-initio calculations for bulk jacutingaite. Together with the relatively high electron mobility extracted from the experiments ($approx 2000$ cm$^2$/Vs, comparable to what is observed in WTe$_2$ crystals of the same thickness), our results indicate that monolayer jacutingaite should provide an excellent platform to investigate transport in 2D quantum spin Hall systems." @default.
- W3100143410 created "2020-11-23" @default.
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- W3100143410 date "2020-03-20" @default.
- W3100143410 modified "2023-10-02" @default.
- W3100143410 title "Multi-frequency Shubnikov-de Haas oscillations in topological semimetal Pt<sub>2</sub>HgSe<sub>3</sub>" @default.
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- W3100143410 doi "https://doi.org/10.1088/2053-1583/ab7689" @default.
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