Extreme magnetoresistance in the topologically trivial lanthanum monopnictide LaAs

Yang, Hung‐Yu; Nummy, Thomas; Li, Haoxiang; Jaszewski, Samantha T.; Abramchuk, Mykola; Dessau, D. S.; Tafti, Fazel

doi:10.1103/physrevb.96.235128

Cited by 54 publications

(57 citation statements)

References 49 publications

(71 reference statements)

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“…with B ef f = 7.875 T being the the reciprocal of average inverse field from the window where FFT was performed: Observing good agreement of SdH analysis, the calculations and multiband fitting of magnetotransport (described in next section), all revealing or taking into account strong anisotropy of electron pocket, we decided not to pursue angle-dependent SdH measurements as we expect that they would yield results very similar to those presented in other papers on similar monopnictides 20,21,34,49 .…”

Section: Magnetoresistance Electrical Resistivity and Hall Resistivitymentioning

confidence: 98%

Magnetoresistance in LuBi and YBi semimetals due to nearly perfect carrier compensation

et al. 2018

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Monobismuthides of lutetium and yttrium are shown as new representatives of materials which exhibit extreme magnetoresistance and magnetic-field-induced resistivity plateaus. At low temperatures and in magnetic fields of 9 T the magnetoresistance attains orders of magnitude of 10 4 % and 10 3 %, on YBi and LuBi, respectively. Our thorough examination of electron transport properties of both compounds show that observed features are the consequence of nearly perfect carrier compensation rather than of possible nontrivial topology of electronic states. The field-induced plateau of electrical resistivity can be explained with Kohler scaling. An anisotropic multiband model of electronic transport describes very well the magnetic field dependence of electrical resistivity and Hall resistivity. Data obtained from the Shubnikov-de Haas oscillations analysis also confirm that the Fermi surface of each compound contains almost equal amounts of holes and electrons. First-principle calculations of electronic band structure are in a very good agreement with the experimental data.

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Section: Magnetoresistance Electrical Resistivity and Hall Resistivitymentioning

confidence: 98%

Magnetoresistance in LuBi and YBi semimetals due to nearly perfect carrier compensation

et al. 2018

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“…[1][2][3][4][5][6][7][8][9][10]. This is equivalent to H [110] used in the magnetization and transport experiments.Figures 2(a-d) show representative diffraction patterns along the [HHH] direction at T = 1.5 K and H = 0, 1.5, 2, and 3 T covering all the MM phase transitions.…”

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confidence: 99%

Interplay of magnetism and transport in HoBi

et al. 2018

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We report the observation of an extreme magnetoresistance (XMR) in HoBi with a large magnetic moment from Ho f -electrons. Neutron scattering is used to determine the magnetic wave vectors across several metamagnetic (MM) transitions on the phase diagram of HoBi. Unlike other magnetic rare-earth monopnictides, the field dependence of resistivity in HoBi is non-monotonic and reveals clear signatures of every metamagnetic transition in the low-temperature and low-field regime, at T < 2 K and H < 2.3 T. The XMR appears at H > 2.3 T after all the metamagnetic transitions are complete and the system is spin-polarized by the external magnetic field. The existence of an onset field for XMR and the intimate connection between magnetism and transport in HoBi are unprecedented among the magnetic rare-earth monopnictides. Therefore, HoBi provides a unique opportunity to understand the electrical transport in magnetic XMR semimetals. PACS numbers: 71.20.Eh, 75.30.Kz, Non-magnetic rare-earth monopnictides with a chemical formula RX where R = Y or La and X = As, Sb, and Bi have attracted attention because they exhibit a non-saturating and extremely large magnetoresistance (XMR) [1][2][3][4][5][6][7][8][9][10][11][12][13]. A topological to trivial transition is reported in the LaX family, from LaBi to LaAs, with XMR being present on either side of the transition confirming that XMR originates from an electron-hole compensation instead of a topological band structure [6,14]. Recently, XMR has been reported in a few magnetic rareearth monopnictides including CeSb [15], NdSb [16,17], GdSb and GdBi [15,18,19] where f -electrons provide localized moments. In these magnetic semimetals, the itinerant d/p-electrons couple to the localized felectrons through the Ruderman-Kittel-Kasuya-Yosida (RKKY) interaction [20,21] giving rise to antiferromagnetic (AFM) order, field induced metamagnetic (MM) transitions, and rich magnetic phase diagrams [22][23][24][25][26][27][28]. Despite complex magnetization curves M (H) with multiple MM transitions, the magnetic monopnictides exhibit plain quadratic resistivity curves ρ(H) and an XMR behavior that is indistinguishable from their non-magnetic analogues in the low-temperature regime (T < 2 K) [15,17]. From LaSb/LaBi to CeSb, NdSb, and then GdSb/GdBi, the lanthanide becomes progressively more magnetic, but intriguingly no strong response of transport and XMR to magnetism has been observed so far.In search of such connection between magnetism and transport properties in a magnetic XMR material, we decided to study HoBi where Ho 3+ ions provide the largest * fazel.tafti@bc.edu total angular momentum J = L + S among the R 3+ ions. Through a combination of magnetization, neutron scattering, and transport experiments, we unveil an intimate relation between the electronic transport and the magnetism of HoBi unlike any previously studied magnetic RX system. Using neutron diffraction, we reveal a new ( 1 /6, 1 /6, 1 /6) ordered state at intermediate fields which strongly affects the resistivity behavior. T...

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“…We also note that an extreme magnetoresistance has been identified in the topologically trivial material LaAs 41 . In our setup it is quite clear that the topology of the Weyl node is not the root of this effect-nevertheless, the band structure of a type-II Weyl node is perfectly primed to allow this effect.…”

Section: Discussionmentioning

confidence: 60%

Quantum oscillations and magnetoresistance in type-II Weyl semimetals: Effect of a field-induced charge density wave

2018

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Recent experiments on type-II Weyl semimetals such as WTe2, MoTe2, MoxW1−xTe2 and WP2 reveal remarkable transport properties in presence of a strong magnetic field, including an extremely large magnetoresistance and an unusual temperature dependence. Here, we investigate magnetotransport via the Kubo formula in a minimal model of a type-II Weyl semimetal taking into account the effect of a charge density wave (CDW) transition, which can arise even at weak coupling in the presence of a strong magnetic field because of the special Landau level dispersion of type-II Weyl systems. Consistent with experimental measurements we find an extremely large magnetoresistance with close to B 2 scaling at particle-hole compensation, while in the extreme quantum limit there is a transition to a qualitatively new scaling with approximately B 0.75 . We also investigate the Shubnikov-de Haas effect and find that the amplitude of the resistivity quantum oscillations are greatly enhanced below the CDW transition temperature which is accompanied by an unusual non-monotonous (non-Lifshitz-Kosevich) temperature dependence. arXiv:1804.02163v1 [cond-mat.mes-hall] 6 Apr 2018 H int = U 2 n1,n2,n3,n4, p1,p2,kz,k z , qx,qy,qz e iqy(p1−p2−qx) J n4,n1 (q)J n3,n2 (−q) α,β=A,B c † α,n1,p1,kz c † β,n2,p2,k z c β,n3,p2+qx,k z +qz c α,n4,p1−qx,kz−qz . (8)

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Extreme magnetoresistance in the topologically trivial lanthanum monopnictide LaAs

Cited by 54 publications

References 49 publications

Magnetoresistance in LuBi and YBi semimetals due to nearly perfect carrier compensation

Magnetoresistance in LuBi and YBi semimetals due to nearly perfect carrier compensation

Interplay of magnetism and transport in HoBi

Quantum oscillations and magnetoresistance in type-II Weyl semimetals: Effect of a field-induced charge density wave

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