Systematic study of doping dependence on linear magnetoresistance in <i>p</i>-PbTe

Schneider, Johannes; Peres, M. L.; Wiedmann, Steffen; Zeitler, U.; Chitta, V. A.; Abramof, E.; Rappl, P. H. O.; Castro, S. de; Soares, D. A. W.; Mengui, U. A.; Oliveira, N. F.

doi:10.1063/1.4900486

Cited by 7 publications

(3 citation statements)

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“…[ 52 ] However, the large MR commonly accompanying with intense SdH oscillations at high fields is not ideal for magento‐electric sensing and not beneficial for the applications of topological semimetals single crystals. The MR of single‐crystalline film of PbTe [ 63 ] and Bi 2 Te 3 [ 64 ] is relatively lower due to their lower μ. In addition, polycrystalline materials generally own a much lower MR of 10 1 %–10 3 % than that of single‐crystalline materials, which is due to their rather lower μ of ≈10 3 cm 2 V –1 s –1 or smaller.…”

Section: Resultsmentioning

confidence: 99%

“…[61,62] The Quantum LMR is usually observed in singlecrystalline bulks and films, whereby all electrons occupy the lowest Landau level in the quantum limit. The linear MR in single crystals of Dirac semimetals of Cd 3 As 2 , [50] LaSb [49] and Na 3 Bi [53] as well as in single-crystalline films of PbTe [63] and Bi 2 Te 3 [64] is categorized as Quantum LMR, which, however, is not applied to polycrystalline NbP 1+x . The classical LMR is discovered in a disordered system, in which macroscopic inhomogeneities create distorted current paths misaligned with the applied voltage at large B, and thus contribute the Hall resistance (ρ yx ∝ B) to the effective MR. [61,62] Many polycrystalline samples are suitable for the classical LMR model, including Ag 2 Se, [65] mosaic-like bilayer graphene, [66] Bi 2 O 2 Se, [67] InSb, [68] and so on.…”

Section: Carrier Transport By Two-bands Model and Unsaturated Quasi-l...mentioning

confidence: 99%

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Weyl Semimetal States Generated Extraordinary Quasi‐Linear Magnetoresistance and Nernst Thermoelectric Power Factor in Polycrystalline NbP

Liu

Wang

et al. 2022

Adv Funct Materials

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Unsaturated and extremely large magnetoresistance (MR), as well as the giant Nernst effect, are intriguing transport phenomena in Weyl semimetals, which are technically appealing for potential applications in magneto-electric sensors and transverse thermoelectric conversion. The prominent properties are originated from Weyl semimetal states, i.e., the coexistence of electron and hole pockets combined with linear band dispersion. However, previous studies have been focused on small-sized single crystals, rendering the practical applications of Weyl semimetals. Here, it is reported an unsaturated, quasi-linear MR as well as a very large Nernst power factor PF xy in the prepared centimeter-sized and polycrystalline Weyl semimetal NbP. An extraordinary MR of ≈2 × 10 4 % is observed below 60 K with a magnetic field up to 55 T and persists to elevated temperatures. The unusual quasi-linear MR behavior is explained by the theory of classical linear MR arising from structural disorder. The polycrystalline NbP exhibits state-of-the-art PF xy that reaches a maximum value of 74.81 μW cm -1 K -2 at 9 T and 220 K, which is 1.5 times larger than its longitudinal thermoelectric power factor PF xx . Given that polycrystalline Weyl semimetal, NbP is suitable for large-scale production, the results pave the way for its practical applications in magneto-electric sensors and transverse thermoelectric conversion.

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Section: Resultsmentioning

confidence: 99%

Section: Carrier Transport By Two-bands Model and Unsaturated Quasi-l...mentioning

confidence: 99%

Weyl Semimetal States Generated Extraordinary Quasi‐Linear Magnetoresistance and Nernst Thermoelectric Power Factor in Polycrystalline NbP

Liu

Wang

et al. 2022

Adv Funct Materials

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“…However, this simple picture is known to fail in numerous cases. Non-saturating linear TMR has been observed in electronic systems ranging from potassium [1], to doped silicon [2], 2D electron gas system [3], 3D doped semi-conductors and Dirac materials [4][5][6][7][8][9][10][11], density wave materials [12], or correlated materials [13]. LMR, one order of magnitude smaller (than and with an opposite sign to) its transverse counterpart has been observed in silver chalcogenides [5] and topological materials [14,15].…”

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confidence: 99%

Quasi-isotropic orbital magnetoresistance in lightly doped SrTiO$_{3}$

Collignon,

Awashima,

Lin

et al. 2021

Preprint

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A magnetic field parallel to an electrical current does not produce a Lorentz force on the charge carriers. Therefore, orbital longitudinal magnetoresistance is unexpected. Here we report on the observation of a large and non saturating magnetoresistance in lightly doped SrTiO3−x independent of the relative orientation of current and magnetic field. We show that this quasi-isotropic magnetoresistance can be explained if the carrier mobility along all orientations smoothly decreases with magnetic field. This anomalous regime is restricted to low concentrations when the dipolar correlation length is longer than the distance between carriers. We identify cyclotron motion of electrons in a potential landscape tailored by polar domains as the cradle of quasi-isotropic orbital magnetoresistance. The result emerges as a challenge to theory and may be a generic feature of lightly-doped quantum paralectric materials.

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Large linear magnetoresistance in topological crystalline insulator Pb0.6Sn0.4Te

Roychowdhury¹,

Ghara

Guin³

et al. 2016

Journal of Solid State Chemistry

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Systematic study of doping dependence on linear magnetoresistance in p-PbTe

Abstract: Articles you may be interested in Effect of pressure on the parameters of the superconducting transition in In-doped Pb z Sn1− z Te semiconducting solid solutions Low Temp.

Cited by 7 publications

References 27 publications

Weyl Semimetal States Generated Extraordinary Quasi‐Linear Magnetoresistance and Nernst Thermoelectric Power Factor in Polycrystalline NbP

Weyl Semimetal States Generated Extraordinary Quasi‐Linear Magnetoresistance and Nernst Thermoelectric Power Factor in Polycrystalline NbP

Quasi-isotropic orbital magnetoresistance in lightly doped SrTiO$_{3}$

Large linear magnetoresistance in topological crystalline insulator Pb0.6Sn0.4Te

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