Transport properties of kagome metals RV<sub>6</sub>Sn<sub>6</sub> (R=Sc, Lu, Y): What makes Sc special?

ORAL

Abstract

Kagome lattices are potential hosts to both topologically protected bands as well as non-dispersing or flat bands. This concurrence has led to a variety of magnetic and electronic properties such as anomalous Hall effect, topological Hall effect, charge density waves (CDW) and superconductivity. Some of these effects can coexist as is shown in a series of vanadium antimonide AV3Sb5 (A= K, Rb, Cs). ScV6Sn6 is a new member of kagome metals with a similar CDW below 92 K. Surprisingly, CDW is absent in the sister compounds LuV6Sn6 and YV6Sn6. Our detailed transport measurements reveal strong anisotropy in the ScV6Sn6 compound. We discuss the differences and similarities in the electronic transport properties of these three isoelectronic and isostructural vanadium kagome metals. Our results provide insights on why only ScV6Sn6 hosts the CDW.



*The authors acknowledge support from AFOSR MURI (Novel Light–Matter Interactions in Topologically Non-Trivial Weyl Semimetal Structures and Systems), grant AFOSR # FOA-AFRL-AFOSR-2019-0002 and the Gordon and Betty Moore Foundation's EPiQS Initiative, Grant GBMF9069.

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Presenters

  • Shirin Mozaffari

    • University of Tennessee, Knoxville
    • University of Tennessee

Authors

  • Shirin Mozaffari

    • University of Tennessee, Knoxville
    • University of Tennessee

  • Richa Pokharel Madhogaria

    • University of Tennessee Knoxville
    • University of Tennessee

  • William R Meier

    • University of Tennessee
    • University of Tennesee

  • Hasitha Suriya Arachchige

    • The University of Tennessee, Knoxville
    • University of Tennessee
    • University of Tennessee Knoxville

  • Takahiro Matsuoka

    • University of Tennessee

  • Caleb L Allen

    • University of Tennessee
    • University of Tennessee Knoxville

  • Jeremy H Driver

    • University of Tennessee
    • University of Tennessee Knoxville

  • John W Villanova

    • Oak Ridge National Laboratory

  • SEOUNGHUN KANG

    • Oak Ridge National Lab
    • Oak Ridge National Laboratory

  • Mina Yoon

    • Oak Ridge National Lab

  • David G Mandrus

    • University of Tennessee
    • Oak Ridge National Laboratory