Extreme magnetoresistance induced by Zeeman effect-driven electron-hole compensation and topological protection in MoSi${}_2$

Abstract

The magnetoresistance is the magnetic field induced change of electrical resistivity of a material. Recent studies have revealed extremely large magnetoresistance in several non-magnetic semimetals, which has been explained on the basis of either electron-hole compensation or the Fermi surface topology, or the combination of both. Here, we present a single crystal study on MoSi${}_2$, which exhibits extremely large magnetoresistance, approaching almost 10${}^7$ % at 2 K and 14 T magnetic field. It is found that the electron-hole compensation level in MoSi${}_2$ evolves with magnetic field, which is resulted from strong Zeeman effect, and found beneficial in boosting the large non-saturating magnetoresistance. The non-trivial Berry phase in the de Haas-van Alphen oscillations and the moderate suppression of backward scattering of the charge carriers lend support for the topological nature of this semimetal. The ultra-large carrier mobility of the topologically protected charge carriers reinforces the magnetoresistance of MoSi2 to an unprecedented large value.

16 pages, 5 Figures and one Table

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Cited by in corpus (10)

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• Giant magnetoresistance, Fermi surface topology, Shoenberg effect and vanishing quantum oscillations in type-II Dirac semimetal candidates MoSi${}_2$ and WSi${}_2$
• Origin of the butterfly magnetoresistance in ZrSiS
• Pressure effect on the topologically nontrivial electronic state and transport of lutecium monobismuthide
• Shubnikov-de Haas and de Haas-van Alphen oscillation in Czochralski grown CoSi single crystal
• Linear unsaturated magnetoresistance in YSi single crystal
• Fermi surface studies of a non-trivial topological compound YSi
• Electronic structure in a transition metal dipnictide TaAs2
• Materials and possible mechanisms of extremely large magnetoresistance: A review
• Fermi surface and Berry phase analysis for Dirac nodal line semimetals: cautionary tale to SrGa${}_2$ and BaGa${}_2$