Abstract
The recent discovery of a charge density (CDW) state in ScV6Sn6 at TCDW = 91 K offers new opportunities to understand the origins of electronic instabilities in topological kagome systems. By comparing to the isostructural non-CDW compound LuV6Sn6, we unravel interesting electrical transport properties in ScV6Sn6, 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 ScV6Sn6 changes from metal-like to insulator-like above the CDW transition. We show that in the charge-ordered state ScV6Sn6 follows the Fermi liquid behavior while above that, the resistivity varies sublinearly over a broad temperature range. The sublinear resistivity, which scales by T3/5 is a common feature among other vanadium-containing kagome compounds exhibiting CDW states such as KV3Sb5, RbV3Sb5, and CsV3Sb5. By contrast, the sublinear behavior of the resistivity does not occur in LuV6Sn6. Finally, we show anomalous Hall-like behavior in ScV6Sn6 below TCDW, which is absent in the Lu compound. Comparing the transport properties of ScV6Sn6 and LuV6Sn6 is valuable to highlight the impacts of the unusual CDW in the Sc compound.
| Original language | English |
|---|---|
| Article number | 035135 |
| Journal | Physical Review B |
| Volume | 110 |
| Issue number | 3 |
| DOIs | |
| State | Published - Jul 15 2024 |
Funding
S.M., R.P.M., and D.G.M. acknowledge the support from AFOSR MURI (Novel Light-Matter Interactions in Topologically Non-Trivial Weyl Semimetal Structures and Systems), Grant No. FA9550-20-1-0322. S.M., W.R.M., and H.W.S.A. acknowledge the support from the Gordon and Betty Moore Foundation's EPiQS Initiative, Grant No. GBMF9069 to D.G.M. This publication is funded in part by a QuantEmX grant from ICAM and the Gordon and Betty Moore Foundation through Grant No. GBMF9616 to S.M. Y.Z. is supported by the National Science Foundation Materials Research Science and Engineering Center program through the University of Tennessee Knoxville Center for Advanced Materials and Manufacturing (DMR-2309083). Theory work at the Oak Ridge was supported by the U.S. Department of Energy (DOE), Office of Science, National Quantum Information Science Research Centers, Quantum Science Center (S.-H.K.), and by the U.S. Department of Energy, Office of Science, Office of Basic Energy Sciences, Materials Sciences and Engineering Division (J.W.V. and M.Y.). This research used resources of the Oak Ridge Leadership Computing Facility at the Oak Ridge National Laboratory, which is supported by the Office of Science of the U.S. Department of Energy under Contract No. DE-AC05-00OR22725 and resources of the National Energy Research Scientific Computing Center, a DOE Office of Science User Facility supported by the Office of Science of the U.S. Department of Energy under Contract No. DE-AC02-05CH11231 using NERSC Award No. BES-ERCAP0024568. L.L. acknowledges the support from the National Science Foundation under Award No. DMR-2317618 (transport properties) and the Department of Energy under Award No. DE-SC0020184 (magnetometry). We thank Brenden Ortiz and Andrea Capa Slinas for sharing the raw data for resistivity. S.M., R.P.M., and D.G.M. acknowledge the support from AFOSR MURI (Novel Light-Matter Interactions in Topologically Non-Trivial Weyl Semimetal Structures and Systems), Grant No. FA9550-20-1-0322. S.M., W.R.M., and H.W.S.A. acknowledge the support from the Gordon and Betty Moore Foundation's EPiQS Initiative, Grant No. GBMF9069 to D.G.M. This publication is funded in part by a QuantEmX grant from ICAM and the Gordon and Betty Moore Foundation through Grant No. GBMF9616 to S.M. Y.Z. is supported by the National Science Foundation Materials Research Science and Engineering Center program through the University of Tennessee Knoxville Center for Advanced Materials and Manufacturing (DMR-2309083). Theory work at the Oak Ridge was supported by the U.S. Department of Energy (DOE), Office of Science, National Quantum Information Science Research Centers, Quantum Science Center (S.-H.K.), and by the U.S. Department of Energy, Office of Science, Office of Basic Energy Sciences, Materials Sciences and Engineering Division (J.W.V. and M.Y.). This research used resources of the Oak Ridge Leadership Computing Facility at the Oak Ridge National Laboratory, which is supported by the Office of Science of the U.S. Department of Energy under Contract No. DE-AC05-00OR22725 and resources of the National Energy Research Scientific Computing Center, a DOE Office of Science User Facility supported by the Office of Science of the U.S. Department of Energy under Contract No. DE-AC02-05CH11231 using NERSC Award No. BES-ERCAP0024568. L.L. acknowledges the support from the National Science Foundation under Award No. DMR-2317618 (transport properties) and the Department of Energy under Award No. DE-SC0020184 (magnetometry). We thank Brenden Ortiz and Andrea Capa Slinas for sharing the raw data for and resistivity.