Huge linear magnetoresistance due to open orbits in 
<mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML"><mml:mrow><mml:mi>γ</mml:mi><mml:mtext>−</mml:mtext><mml:msub><mml:mi>PtBi</mml:mi><mml:mn>2</mml:mn></mml:msub></mml:mrow></mml:math>

Wu, Beilun; Barrena, Víctor; Suderow, Hermann; Guillamón, Isabel

doi:10.1103/physrevresearch.2.022042

Cited by 21 publications

(15 citation statements)

References 41 publications

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“…Resistivity measurements have been performed using the four probe AC method, with four electrical contacts made by gluing 25 µm gold wires with silver epoxy on the cleaved surface of LaRu 2 P 2 samples. For magnetoresistance measurements, we have used a cryostat with base temperature 1 K and equipped with a 20+2 T superconducting magnet [21][22][23]. Resistivity was measured using a SR 830 lock-in amplifier.…”

Section: Methodsmentioning

confidence: 99%

Large magnetoresistance in the iron-free pnictide superconductor LaRu$_2$P$_2$

Fernández-Lomana¹,

Barrena²,

Wu³

et al. 2020

Preprint

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The magnetoresistance of iron pnictide superconductors is often dominated by electron-electron correlations and deviates from the H 2 or saturating behaviors expected for uncorrelated metals.Contrary to similar Fe-based pnictide systems, the superconductor LaRu 2 P 2 (T c = 4 K) shows no enhancement of electron-electron correlations. Here we report a non-saturating magnetoresistance deviating from the H 2 or saturating behaviors in LaRu 2 P 2 . We have grown and characterized high quality single crystals of LaRu 2 P 2 and measured a magnetoresistance following H 1.3 up to 22 T. We discuss our result by comparing the bandstructure of LaRu 2 P 2 with Fe based pnictide superconductors. The different orbital structures of Fe and Ru leads to a 3D Fermi surface with negligible bandwidth renormalization in LaRu 2 P 2 , that contains a large open sheet over the whole Brillouin zone. We show that the large magnetoresistance in LaRu 2 P 2 is unrelated to the one obtained in materials with strong electron-electron correlations and that it is compatible instead with conduction due to open orbits on the rather complex Fermi surface structure of LaRu 2 P 2 .

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Section: Methodsmentioning

confidence: 99%

Large magnetoresistance in the iron-free pnictide superconductor LaRu$_2$P$_2$

Fernández-Lomana¹,

Barrena²,

Wu³

et al. 2020

Preprint

Self Cite

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“…This emerges theoretically through a characteristic exponent exp(−W/|ωc|τ0) in Eqs. ( 5) and (6). The turnover scale B * depends on microscopic details and is given by…”

Section: Specific Modelmentioning

confidence: 99%

“…Kohler's rule may be violated in systems containing multiple bands, T -dependent anisotropy [3], a separation of lifetimes [4,5] or open orbits [6,7]. In addition, a lack of saturation in the MR can occur in perfectly charge-neutral semimetals [8].…”

Section: Introductionmentioning

confidence: 99%

$B^2$ to $B$-linear magnetoresistance due to impeded orbital motion

H.¹,

Hinlopen²,

Ayres³

et al. 2022

Preprint

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Strange metals exhibit a variety of anomalous magnetotransport properties, the most striking of which is a resistivity that increases linearly with magnetic field B over a broad temperature and field range. The ubiquity of this behavior across a spectrum of correlated metals -both singleand multi-band, with either dominant spin and/or charge fluctuations, of varying levels of disorder or inhomogeneity and in proximity to a quantum critical point or phase -obligates the search for a fundamental underlying principle that is independent of the specifics of any material. Strongly anisotropic (momentum-dependent) scattering can generate B-linear magnetoresistance but only at intermediate field strengths. At high enough fields, the magnetoresistance must eventually saturate. Here, we consider the ultimate limit of such anisotropy, a region or regions on the Fermi surface that impede all orbital (cyclotron) motion through them, but whose imposition can be modelled nonetheless through a modified Boltzmann theoretical treatment. Application of the proposed theorem suggests that the realization of quadratic-to-linear magnetoresistance requires the presence of a bounded sector on the Fermi surface possibly separating two distinct types of carriers. While this bounded sector may have different origins or manifestations, we expect its existence to account for the anomalous magnetotransport found in a wide range of correlated materials.

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“…Note that, application of MS requires material to have relatively large magnetoresistance. PtBi with a layered hexagonal crystal structure was reported to exhibit a large magnetoresistance 28 – 32 . Both band structures and invariant calculations suggest PtBi as a possible candidate for bulk topological metal 28 .…”

Section: Introductionmentioning

confidence: 99%

“…More recently, APRES measurement and first principle calculation detected five bands that could contribute to the TDP 33 . Magnetoresistance measurement for field up to 22T found that magnetoresistance is related to the angle between the magnetic field and the crystalline c axis 32 . In this paper, we use maximum entropy mobility spectrum analysis 34 (MEMSA) to study carrier properties of PtBi .…”

Section: Introductionmentioning

confidence: 99%

Transport property of multi-band topological material PtBi$$_2$$ studied by maximum entropy mobility spectrum analysis (MEMSA)

Zhao

Chen

et al. 2021

Sci Rep

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Electrical transport of both longitudinal and transverse directions carries rich information. Mobility spectrum analysis (MSA) is capable of extracting charge information from conductivity tensor, including charge types, concentration and mobilities. Using a numerical method based on maximum entropy principle, i.e., maximum entropy mobility spectrum analysis (MEMSA), mobility spectrum for $$\beta $$ β -type PtBi$$_2$$ 2 is studied. Three hole-pockets and two electron-pockets were found, including a small hole pocket with very high mobility, which is very likely corresponding to Dirac Fermions. Benefiting from our high resolution result, we studied temperature dependence of carrier properties and explained the sign change phenomenon of Hall conductivity. We further compared the results with band structure obtained by our first principle calculation. The present results prove MEMSA is a useful tool of extracting carries’ information in recently discovered Iron-based superconductors, and topological materials.

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Huge linear magnetoresistance due to open orbits in γ−PtBi2

Cited by 21 publications

References 41 publications

Large magnetoresistance in the iron-free pnictide superconductor LaRu$_2$P$_2$

Large magnetoresistance in the iron-free pnictide superconductor LaRu$_2$P$_2$

$B^2$ to $B$-linear magnetoresistance due to impeded orbital motion

Transport property of multi-band topological material PtBi$$_2$$ studied by maximum entropy mobility spectrum analysis (MEMSA)

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