Perfect charge compensation in extremely large magnetoresistance materials LaSb and LaBi revealed by the first-principles calculations

Abstract

By the first-principles electronic structure calculations, we have systematically studied the electronic structures of recently discovered extremely large magnetoresistance (XMR) materials LaSb and LaBi. We find that both LaSb and LaBi are semimetals with the electron and hole carriers in perfect balance. The calculated carrier densities in the order of $10^{20}$ cm${}^{-3}$ are in good agreement with the experimental values, implying long mean free time of carriers and thus high carrier mobilities. With a semiclassical two-band model, the perfect charge compensation and high carrier mobilities naturally explain (i) the XMR observed in LaSb and LaBi; (ii) the non-saturating quadratic dependence of XMR on external magnetic field; and (iii) the resistivity plateau in the turn-on temperature behavior at very low temperatures. The explanation of these features without resorting to the topological effect indicates that they should be the common characteristics of all perfectly electron-hole compensated semimetals.

7 pages, 7 figures, 1 table

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Cited by in corpus (48)

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• Fermi surface topology and signature of surface Dirac nodes in LaBi
• Tunable Electronic Structure and Surface States in Rare Earth Mono-Bismuthides with Partially Filled f Shell
• Extremely large magnetoresistance and Fermi surface topology of PrSb
• Observation of topological nodal-loop state in RAs3 (R = Ca, Sr)
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• Unusual magnetotransport in holmium monoantimonide
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• Hybrid functional calculations of electronic structure and carrier densities in rare-earth monopnictides
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• Experimental observation of node-line-like surface states in LaBi
• Fermi Surface and Carriers Compensation of pyrite-type PtBi${}_2$ Revealed by Quantum Oscillations
• Magnetic-field-induced nontrivial electronic state in the Kondo-lattice semimetal CeSb
• Possible Experimental Realization of a Basic Z2 Topological Semimetal
• Extremely large magnetoresistance and high-density Dirac-like fermions in ZrB2
• Observation of gapped state in rare-earth monopnictide HoSb
• Bulk band inversion and surface Dirac cones in LaSb and LaBi : Prediction of a new topological heterostructure
• Magneto-transport and Electronic Structures of BaZnBi${}_2$
• Trivial to nontrivial topology transition in rare-earth pnictides with epitaxial strain
• Probing the Origin of Extreme Magnetoresistance in Pr/Sm Mono-Antimonides/Bismuthides
• Non-stoichiometry effects on the extreme magnetoresistance in Weyl semimetal WTe2
• Raman scattering study of large magnetoresistance semimetals TaAs${}_2$ and NbAs${}_2$
• First principles investigation of topological phase in XMR material TmSb under hydrostatic pressure
• Pressure effect on the topologically nontrivial electronic state and transport of lutecium monobismuthide
• Quantum transport in a compensated semimetal W2As3 with nontrivial Z2 indices
• LaN Structural and Topological Transitions Driven by Temperature and Pressure
• Band engineering of a magnetic thin film rare earth monopnictide
• Large Magnetoresistance and Nontrivial Berry Phase in Nb3Sb Crystals with A15 Structure
• Structural, electronic and topological properties of 3D TmBi compound
• First-principles study on the electron-phonon coupling and magnetoresistance of LaBi under pressure
• Comparative study of the compensated semi-metals LaBi and LuBi : A first-principles approach
• Shubnikov-de Haas and de Haas-van Alphen oscillations in topological semimetal CaAl4
• SrPd, a candidate material with extremely large magnetoresistance
• Direct evidence of electron-hole compensation for XMR in topologically trivial YBi
• Signatures of non-trivial band topology in LaAs/LaBi heterostructure
• Unconventional band splitting of CeSb in the devil's staircase transition
• Spin-orbital order and excitons in magnetoresistive HoBi