Pseudogap behavior in charge density wave kagome material ScV${}_6$Sn${}_6$ revealed by magnetotransport measurements

Abstract

Over the last few years, significant attention has been devoted to studying the kagome materials AV${}_3$Sb${}_5$ (A = K, Rb, Cs) due to their unconventional superconductivity and charge density wave (CDW) ordering. Recently ScV${}_6$Sn${}_6$ was found to host a CDW below $\approx$90K, and, like AV${}_3$Sb${}_5$, it contains a kagome lattice comprised only of V ions. Here we present a comprehensive magnetotransport study on ScV${}_6$Sn${}_6$. We discovered several anomalous transport phenomena above the CDW ordering temperature, including insulating behavior in interlayer resistivity, a strongly temperature-dependent Hall coefficient, and violation of Kohler's rule. All these anomalies can be consistently explained by a progressive decrease in carrier densities with decreasing temperature, suggesting the formation of a pseudogap. Our findings suggest that high-temperature CDW fluctuations play a significant role in determining the normal state electronic properties of ScV${}_6$Sn${}_6$.

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Cited by in corpus (12)

• Kagome metals
• Extended Kohler's Rule of Magnetoresistance in TaCo${}_2$Te${}_2$
• Quantum Oscillations Evidence for Topological Bands in Kagome Metal ScV6Sn6
• Frustrated Ising charge correlations in the kagome metal ScV${}_6$Sn${}_6$
• Anomalous Magnetotransport in the Paramagnetic State of a Magnetic Kagome Metal EuTi${}_3$Bi${}_4$
• Orbital selective commensurate modulations of the local density of states in ScV6Sn6 probed by nuclear spins
• Discovery of an Intermediate Nematic State in a Bilayer Kagome Metal ScV6Sn6
• Interleaved bond frustration in a triangular lattice antiferromagnet
• Pressure suppresses the density wave order in kagome metal LuNb${}_6$Sn${}_6$
• Anomalous Nernst Effect and Its Implications for Time-Reversal Symmetry Breaking in Kagome Metal ScV6Sn6
• Beyond kagome: $p$-bands in kagome metals
• Tunable topological phase in 2D ScV${}_6$Sn${}_6$ kagome material