Magnetotransport properties in a compensated semimetal gray arsenic

Zhao, Lingxiao; Xu, Qiunan; Wang, Xinmin; He, Junbao; Li, Jing; Yang, H. X.; Long, Yanhua; Chen, Dong; Liang, Hui; Li, Chunhong; Xue, Mianqi; Li, Jianqi; Ren, Zhoupeng; Lü, Li; Weng, H. M.; Fang, Zhong; Dai, Xi; Chen, Genfu

doi:10.1103/physrevb.95.115119

Cited by 24 publications

(27 citation statements)

References 33 publications

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“…For all of the magnetic field directions, the dependence of MR on magnetic field is close to quadratic with no indication of saturation, which could be attributed to the perfect compensated of electrons and holes, similar to that observed in WTe 2 and α-As [25,26].…”

supporting

confidence: 70%

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Magnetotransport properties of the triply degenerate node topological semimetal tungsten carbide

Chen

Zhu

et al. 2017

Phys. Rev. B

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We report the magnetoresistance (MR), Hall effect, and de Haas-van Alphen (dHvA) effect studies of single crystals of tungsten carbide, WC, which is predicted to be a new type of topological semimetal with triply degenerate nodes. With the magnetic field rotated in the plane perpendicular to the current, WC shows a field induced metal-to-insulator-like transition and large nonsaturating quadratic MR at low temperatures. As the magnetic field parallel to the current, a pronounced negative longitudinal MR only can be observed for the certain direction of current flow. Hall effect indicates WC is a perfect compensated semimetal, which may be related to the large nonsaturating quadratic MR. The analysis of dHvA oscillations reveals that WC is a multiband system with small cross-sectional areas of Fermi surface and light cyclotron effective masses. Our results indicate that WC is an ideal platform to study the recently proposed "New Fermions" with triply degenerate crossing points.

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supporting

confidence: 70%

“…At low temperatures, the densities of holes and electrons are quite close, however, the mobility of holes is larger than that of electrons. This demonstrates that the large nonsaturating quadratic MR could stem from the perfect electron-hole compensation and high hole mobilities, similar to those observed in WTe 2 and α-As [25,26].…”

supporting

confidence: 63%

Magnetotransport properties of the triply degenerate node topological semimetal tungsten carbide

Chen

Zhu

et al. 2017

Phys. Rev. B

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“…It is essential to examine the variability in MR with respect to the mobility in these compounds. We gathered these two quantities for various compounds at ∼2 K and 9 T from literature [11][12][13][14][15][16][17][18][19][20][21][22][23][24][25][26][27][39][40][41][42]. As MR varies with the field, it is more valid to consider the slope of the MR with the field than considering the value of MR in a fix field.…”

Section: Resultsmentioning

confidence: 99%

Strong correlation between mobility and magnetoresistance in Weyl and Dirac semimetals

Singh¹,

Süβ²,

Schmidt³

et al. 2020

J. Phys. Mater.

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The discovery of Weyl and Dirac fermions in solid systems is a recent major breakthrough in the field of condensed matter physics. These materials exhibit extraordinary properties in terms of carrier mobility and magnetoresistance (MR). These two quantities are highly dependent in the Weyl semimetal transition monopnictide family, i.e. NbP, TaP, NbAs, and TaAs. Furthermore, the gathered mobility and MR (or slope of MR) at 2 K in 9 T of other well-known Weyl and Dirac semimetals follow a relation similar to the right turn symbol, i.e. the MR increases rapidly with mobility; thereafter it begins to saturate after reaching a value of 10 3 . This suggests a nonlinear dependency. Nevertheless, for materials possessing high carrier mobility, it is valid to expect high MR.

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“…Recently, such a large orbital magnetoresistance has been observed in many dilute metals. The list includes three-dimensional Dirac systems (Cd 3 As 2 [5]), Weyl semi-metals (WTe 2 [6], NbP [7] or WP 2 [8,9], LaBi [10]), but also 'trivial' semi-metals (LaSb [11], gray arsenic [12]). Reporting on the large magnetoresistance in WTe 2 , Ali et al [6] contrasted its unsaturated B 2 behavior to the quasi-linear and eventually saturating highfield magnetoresistance of well-known semi-metals such as bismuth and graphite.…”

mentioning

confidence: 99%

Magnetoresistance of semimetals: The case of antimony

Fauqué

Yang

Tabiś

et al. 2018

Phys. Rev. Materials

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Large unsaturated magnetoresistance has been recently reported in numerous semi-metals. Many of them have a topologically non-trivial band dispersion, such as Weyl nodes or lines. Here, we show that elemental antimony displays the largest high-field magnetoresistance among all known semi-metals. We present a detailed study of the angle-dependent magnetoresistance and use a semiclassical framework invoking an anisotropic mobility tensor to fit the data. A slight deviation from perfect compensation and a modest variation with magnetic field of the components of the mobility tensor are required to attain perfect fits at arbitrary strength and orientation of magnetic field in the entire temperature window of study. Our results demonstrate that large orbital magnetoresistance is an unavoidable consequence of low carrier concentration and the sub-quadratic magnetoresistance seen in many semi-metals can be attributed to field-dependent mobility, expected whenever the disorder length-scale exceeds the Fermi wavelength.

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Magnetotransport properties in a compensated semimetal gray arsenic

Cited by 24 publications

References 33 publications

Magnetotransport properties of the triply degenerate node topological semimetal tungsten carbide

Magnetotransport properties of the triply degenerate node topological semimetal tungsten carbide

Strong correlation between mobility and magnetoresistance in Weyl and Dirac semimetals

Magnetoresistance of semimetals: The case of antimony

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