The Hall Effect in Single Crystals of Topological Semimetals WTe2 and MoTe2

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Аннотация

The Hall effect in single crystals of topological semimetals WTe2 and MoTe2 is studied in the temperature range from 2 to 100 K and in magnetic fields up to 9 T. It is established that the Hall resistivity of WTe2 shows a nonlinearly dependence on the magnetic field at temperatures below 100 K. At the same time, the Hall resistivity of MoTe2 depends linearly with the magnetic field at temperatures range from 2 to 25 K and a nonlinear contribution appears at 50 K. Along with the known mechanism of compensation/decompensation of electron and hole charge carriers, the nonlinear dependence of the Hall resistivity of WTe2 and MoTe2 single crystals on the magnetic field is associated with the scattering of charge carriers on the surface.

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Авторлар туралы

A. Perevalova

M.N. Mikheev Institute of Metal Physics of the Ural Branch of the Russian Academy of Sciences

Хат алмасуға жауапты Автор.
Email: domozhirova@imp.uran.ru
Ресей, Ekaterinburg

S. Naumov

M.N. Mikheev Institute of Metal Physics of the Ural Branch of the Russian Academy of Sciences

Email: domozhirova@imp.uran.ru
Ресей, Ekaterinburg

B. Fominykh

M.N. Mikheev Institute of Metal Physics of the Ural Branch of the Russian Academy of Sciences; Ural Federal University

Email: domozhirova@imp.uran.ru
Ресей, Ekaterinburg; Ekaterinburg

E. Marchenkova

M.N. Mikheev Institute of Metal Physics of the Ural Branch of the Russian Academy of Sciences

Email: domozhirova@imp.uran.ru
Ресей, Ekaterinburg

S. Liang

Hubei University

Email: domozhirova@imp.uran.ru
ҚХР, Wuhan

V. Marchenkov

M.N. Mikheev Institute of Metal Physics of the Ural Branch of the Russian Academy of Sciences; Ural Federal University

Email: march@imp.uran.ru
Ресей, Ekaterinburg; Ekaterinburg

Әдебиет тізімі

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2. Fig. 1. Fragments of X-ray radiographs taken from the surface of WTe2 and MoTe2 single crystals

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3. Fig. 2. Analysis of the chemical composition of WTe2 and MoTe2 single crystals at the surface areas shown in the corresponding insets. The ratio of W and Te is 33.17 and 66.83 at. %. The ratio of Mo and Te is 33.01 and 66.99 at. %

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4. Fig. 3. Temperature dependences of the electrical resistivity ρ(T) of WTe2 and MoTe2 single crystals in the temperature range from 2 to 290 K

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5. Fig. 4. Field dependences of the Hall resistance ρxy(B) of WTe2 single crystal at temperatures from 2 to 100 K in fields up to 9 Tesla

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6. Fig. 5. Field dependences of the Hall resistance ρxy(B) of MoTe2 single crystal at temperatures from 2 to 50 K in fields up to 9 Tesla

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