Universal sublinear resistivity in vanadium kagome materials hosting charge density waves

Shirin Mozaffari; William R. Meier; Richa P. Madhogaria; Nikolai Peshcherenko; Seoung-Hun Kang; John W. Villanova; Hasitha W. Suriya Arachchige; Guoxin Zheng; Yuan Zhu; Kuan-Wen Chen; Kaila Jenkins; Dechen Zhang; Aaron Chan; Lu Li; Mina Yoon; Yang Zhang; David G. Mandrus

doi:10.1103/PhysRevB.110.035135

paper

Universal sublinear resistivity in vanadium kagome materials hosting charge density waves

arXiv:2305.02393 · doi:10.1103/PhysRevB.110.035135

Abstract

The recent discovery of a charge density (CDW) state in ScV $_{6}$ Sn $_{6}$ at $T_{CDW}$ = 91 K offers new opportunities to understand the origins of electronic instabilities in topological kagome systems. By comparing to the isostructural non-CDW compound LuV $_{6}$ Sn $_{6}$ , we unravel interesting electrical transport properties in ScV $_{6}$ Sn $_{6}$ , above and below the charge ordering temperature. We observed that by applying a magnetic field along the $a$ axis, the temperature behavior of the longitudinal resistivity in ScV $_{6}$ Sn $_{6}$ changes from metal-like to insulator-like above the CDW transition. We show that in the charge ordered state ScV $_{6}$ Sn $_{6}$ follows the Fermi liquid behavior while above that, it transforms into a non-Fermi liquid phase in which the resistivity varies sublinearly over a broad temperature range. The sublinear resistivity, which scales by $T^{3/5}$ is a common feature among other vanadium-containing kagome compounds exhibiting CDW states such as KV $_{3}$ Sb $_{5}$ , RbV $_{3}$ Sb $_{5}$ , and CsV $_{3}$ Sb $_{5}$ . By contrast, the non-Fermi liquid behavior does not occur in LuV $_{6}$ Sn $_{6}$ . We explain the $T^{3/5}$ universal scaling behavior from the Coulomb scattering between Dirac electrons and Van Hove singularities; common features in the electronic structure of kagome materials. Finally, we show anomalous Hall-like behavior in ScV $_{6}$ Sn $_{6}$ below $T_{CDW}$ , which is absent in the Lu compound. Comparing the transport properties of ScV $_{6}$ Sn $_{6}$ and LuV $_{6}$ Sn $_{6}$ is valuable to highlight the impacts of the unusual CDW in the Sc compound.

12 pages, 6 figures. Power law behavior of resistivity as a function temperature is modified and theoretical explanation is added in the second version

Universal sublinear resistivity in vanadium kagome materials hosting charge density waves

Abstract

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