Probing the Origin of Extreme Magnetoresistance in Pr/Sm Mono-Antimonides/Bismuthides

Abstract

Combining angle-resolved photoemission spectroscopy and magneto-transport measurements, we systematically investigated the possible origin of the extreme magnetoresistance in Pr/Sm mono-antimonides/bismuthides (PrSb, SmSb, PrBi, SmBi). Our photoemission measurements reveal that the bulk band inversion and surface states are absent (present) in Pr/Sm antimonides (bismuthides), implying that topological surface states are unlikely to play an important role for the observed extreme magnetoresistance. We found that the electron-hole compensation is well satisfied in all these compounds and the bulk band structure exhibits no obvious temperature dependence from 10 K up to 150 K. Simultaneous fittings of the magnetoresistance and Hall coefficient reveal that the carrier mobility is dramatically enhanced at low temperature, which naturally explains the suppression of extreme magnetoresistance at high temperatures. Our results therefore show that the extreme magnetoresistance in these compounds can be well accounted for by the two-band model with good electron-hole compensation. Finally, we found that both PrSb and SmSb exhibit highly linear bulk bands near the X point and lie close to the transition point between a topologically trivial and nontrivial phase, which might be relevant for the observed anomalous quantum oscillations.

arXiv comment6 figures

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Cited by in corpus (11)

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• Evidence of non-trivial Berry phase and Kondo physics in SmBi
• Behavior of gapped and ungapped Dirac cones in an antiferromagnetic topological metal, SmBi
• Epitaxial growth, magnetoresistance, and electronic band structure of GdSb magnetic semimetal films
• Origin of the exotic electronic states in antiferromagnetic NdSb
• Dirac nodal lines in the quasi-one-dimensional ternary telluride TaPtTe${}_5$
• PrBi: Topology meets quadrupolar degrees of freedom
• Extremely large magnetoresistance and compensated Fermi surfaces in the antiferromagnetic semimetal YbAs
• Temperature-dependent Fermi surface probed by Shubnikov-de Haas oscillations in topological semimetal candidates DyBi and HoBi
• Direct evidence of electron-hole compensation for XMR in topologically trivial YBi
• Unconventional band splitting of CeSb in the devil's staircase transition