Magnetotransport properties of the topological nodal-line semimetal CaCdSn

Abstract

Topological nodal-line semimetals support protected band crossings which form nodal lines or nodal loops between the valence and conduction bands and exhibit novel transport phenomena. Here we address the topological state of the nodal-line semimetal candidate material, CaCdSn, and report magnetotransport properties of its single crystals grown by the self-flux method. Our first-principles calculations show that the electronic structure of CaCdSn harbors a single nodal loop around the $\Gamma$ point in the absence of spin-orbit coupling (SOC) effects. The nodal crossings in CaCdSn are found to lie above the Fermi level and yield a Fermi surface that consists of both electron and hole pockets. CaCdSn exhibits high mobility ($\mu \approx 3.44\times 10^4$ cm${}^2$V${}^{-1}$s${}^{-1}$) and displays a field-induced metal-semiconductor like crossover with a plateau in resistivity at low temperature. We observe an extremely large and quasilinear non-saturating transverse as well as longitudinal magnetoresistance (MR) at low temperatures ($\approx 7.44\times 10^3\%$ and $\approx 1.71\times 10^3\%$, respectively, at 4K). We also briefly discuss possible reasons behind such a large quasilinear magnetoresistance and its connection with the nontrivial band structure of CaCdSn.

arXiv comment7 pages, 5 figures, Accepted in PRB

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• Extended Kohler${}^{,}$s Rule of Magnetoresistance
• Electronic structure and physical properties of EuAuAs single crystal
• Experimental and theoretical study of the correlated compound YbCdSn: Evidence for large magnetoresistance and mass enhancement
• Weak antilocalization effect and triply degenerate state in Cu-doped CaAuAs
• Large nonsaturating magnetoresistance, weak anti-localization and non-trivial topological states in SrAl${}_2$Si${}_2$
• Anisotropic non-linear optical response of nodal loop materials
• Dispersive Drumhead States in Nodal-Line Semimetal Junctions
• The inadequacy of the $\rho$-T curve for phase transitions in the presence of magnetic fields
• Tunneling in an anisotropic cubic Dirac semi-metal
• Impurity and dispersion effects on the linear magnetoresistance in the quantum limit
• Tunneling phase diagrams in anisotropic Multi-Weyl semimetals
• Single crystalline orthorhombic GdAlGe as a rare earth magnetic Dirac nodal-line metal
• Interfaces of nodal-line semimetals: drum states, transport and refraction
• Nernst power factor and figure of merit in compensated semimetal ScSb
• Materials and possible mechanisms of extremely large magnetoresistance: A review
• Quasi-nodal lines in rhombohedral magnetic materials
• Enhanced Neel temperature and unusual thermal expansion in flux-grown FeCrAs crystals