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arXiv · 1504.01460

Multiple Fermi pockets revealed by Shubnikov-de Haas oscillations in WTe2

Fei-Xiang Xiang·Menno Veldhorst·Shi-Xue Dou·Xiao-Lin Wang
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Abstract

We use magneto-transport measurements to investigate the electronic structure of WTe2 single crystals. A non-saturating and parabolic magnetoresistance is observed in the temperature range between 2.5 to 200 K and magnetic fields up to 8 T. Shubnikov - de Haas oscillations with beating patterns are observed. The fast Fourier transform of the SdH oscillations reveals three oscillation frequencies, corresponding to three pairs of Fermi pockets with comparable effective masses , m* ~ 0.31 me. By fitting the Hall resistivity, we infer the presence of one pair of electron pockets and two pairs of hole pockets, together with nearly perfect compensation of the electron-hole carrier concentration. These magnetotransport measurements reveal the complex electronic structure in WTe2, explaining the nonsaturating magnetoresistance.

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Fei-Xiang Xiang, Menno Veldhorst, Shi-Xue Dou, Xiao-Lin Wang. 2015-04-07. Multiple Fermi pockets revealed by Shubnikov-de Haas oscillations in WTe2. https://doi.org/10.1209/0295-5075/112/37009

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