Large Magnetoresistance and Nontrivial Berry Phase in Nb3Sb Crystals with A15 Structure

Abstract

Compounds with the A15 structure have attracted extensive attention due to their superconductivity and nontrivial topological band structure. We have successfully grown Nb${}_3$Sb single crystals with a A15 structure and systematically measured the longitudinal resistivity, Hall resistivity and quantum oscillations in magnetization. Similar to other topological trivial/nontrivial semimetals, Nb${}_3$Sb, exhibits large magnetoresistance (MR) at low temperatures (717$\%$, 2 K and 9 T), unsaturating quadratic field dependence of MR and up-turn behavior in ${\rho }_{xx}$(\emph{T}) curves under magnetic field, which is considered to result from a perfect hole-electron compensation, as evidenced by the Hall resistivity measurements. The nonzero Berry phase obtained from the de-Hass van Alphen (dHvA) oscillations demonstrates that Nb${}_3$Sb is topologically nontrivial. These results indicate that Nb${}_3$Sb superconductor is also a semimetal with large MR and nontrivial Berry phase, indicating that Nb${}_3$Sb may be another platform to search for Majorana zero-energy mode.

5 pages, 5 figures. arXiv admin note: text overlap with arXiv:2007.04814, arXiv:2104.03799

References in corpus (10)

• Titanic Magnetoresistance in WTe2
• Quantum transport evidence for a three-dimensional Dirac semimetal phase in Cd3As2
• Anisotropic Magnetotransport and Exotic Longitudinal Linear Magnetoresistance in WTe2 Crystals
• The extremely large magnetoresistance in the Candidate Type-II Weyl semimetal MoTe2
• Superconductivity in the A15 Structure
• Observation of Dirac-like energy band and ring-torus Fermi surface associated with the nodal line in topological insulator CaAgAs
• Presence of Exotic Electronic Surface States in LaBi and LaSb
• Hall-effect within the colossal magnetoresistive semi-metallic state of MoTe2
• Large magnetoresistance in type-II Weyl semimetal WP${}_2$
• Magnetoresistance and Kondo effect in the nodal-line semimetal VAs${}_2$