Galvanomagnetic properties of the putative type-II Dirac semimetal PtTe${}_2$

Abstract

Platinum ditelluride has recently been characterized, based on angle-resolved photoemission spectroscopy data and electronic band structure calculations, as a possible representative of type-II Dirac semimetals. Here, we report on the magnetotransport behavior (electrical resistivity, Hall effect) in this compound, investigated on high-quality single-crystalline specimens. The magnetoresistance (MR) of PtTe${}_2$ is large (over $3000\%$ at $T=1.8$ K in $B=9$ T) and unsaturated in strong fields in the entire temperature range studied. The MR isotherms obey a Kohler's type scaling with the exponent $m$ = 1.69, different from the case of ideal electron-hole compensation. In applied magnetic fields, the resistivity shows a low-temperature plateau, characteristic of topological semimetals. In strong fields, well-resolved Shubnikov - de Haas (SdH) oscillations with two principle frequencies were found, and their analysis yielded charge mobilities of the order of $10^3\mathrm{c}{\mathrm{m}}^2{\mathrm{V}}^{-1}{\mathrm{s}}^{-1}$ and rather small effective masses of charge carriers, $0.11m_e$ and $0.21m_e$. However, the extracted Berry phases point to trivial character of the electronic bands involved in the SdH oscillations. The Hall effect data corroborated a multi-band character of the electrical conductivity in PtTe${}_2$, with moderate charge compensation.

11 pages, 7 figures; accepted for publication in Scientific Reports

References in corpus (15)

• Weyl and Dirac Semimetals in Three Dimensional Solids
• Classification of stable three-dimensional Dirac semimetals with nontrivial topology
• Discovery of Weyl fermion semimetals and topological Fermi arc states
• Type-II Dirac fermions in the PtSe${}_2$ class of transition metal dichalcogenides
• Experimental evidence of type-II Dirac fermions in PtSe2
• Metal-Insulator-Like Behavior in Semimetallic Bismuth and Graphite
• Anisotropic Magnetotransport and Exotic Longitudinal Linear Magnetoresistance in WTe2 Crystals
• The extremely large magnetoresistance in the Candidate Type-II Weyl semimetal MoTe2
• Experimental observation of anisotropic Adler-Bell-Jackiw anomaly in type-II Weyl semimetal WTe${}_{1.98}$ crystals at the quasi-classical regime
• Rules for Phase Shifts of Quantum Oscillations in Topological Nodal-line Semimetals
• Presence of Exotic Electronic Surface States in LaBi and LaSb
• Magnetoresistance in YBi and LuBi semimetals due to nearly perfect carrier compensation
• Origin of the Extremely Large Magnetoresistance in the Semimetal YSb
• Large magnetoresistance in type-II Weyl semimetal WP${}_2$
• Separation of Electron and Hole Dynamics in the Semimetal LaSb

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• Large nonsaturating magnetoresistance, weak anti-localization and non-trivial topological states in SrAl${}_2$Si${}_2$
• Quasi-linear magnetoresistance and paramagnetic singularity in Hypervalent Bismuthide
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