Electronic properties of the topological kagome metals YV6Sn6 and GdV6Sn6

Ganesh Pokharel; Samuel M.L. Teicher; Brenden R. Ortiz; Paul M. Sarte; Guang Wu; Shuting Peng; Junfeng He; Ram Seshadri; Stephen D. Wilson

doi:10.1103/PhysRevB.104.235139

Electronic properties of the topological kagome metals YV6Sn6 and GdV6Sn6

Ganesh Pokharel, Samuel M.L. Teicher, Brenden R. Ortiz, Paul M. Sarte, Guang Wu, Shuting Peng, Junfeng He, Ram Seshadri, Stephen D. Wilson

Research output: Contribution to journal › Article › peer-review

65 Scopus citations

Abstract

The synthesis and characterization of vanadium-based kagome metals YV6Sn6 and GdV6Sn6 are presented. X-ray diffraction, magnetization, magnetotransport, and heat capacity measurements reveal an ideal kagome network of V ions coordinated by Sn and separated by triangular lattice planes of rare-earth ions. The onset of low-temperature magnetic order of Gd spins is detected in GdV6Sn6 and is suggested to be noncollinear, while V ions in both compounds remain nonmagnetic. Density functional theory calculations are presented modeling the band structures of both compounds, which can be classified as Z2 topological metals in the paramagnetic state. Both compounds exhibit high mobility, multiband transport and present an interesting platform for controlling the interplay between magnetic order associated with the R-site sublattice and nontrivial band topology associated with the V-based kagome network. Our results invite future exploration of other RV6Sn6 (R = rare earth) variants where this interplay can be tuned via R-site substitution.

Original language	English
Article number	235139
Journal	Physical Review B
Volume	104
Issue number	23
DOIs	https://doi.org/10.1103/PhysRevB.104.235139
State	Published - Dec 15 2021
Externally published	Yes

Funding

This work was supported via the UC Santa Barbara NSF Quantum Foundry funded via the Q-AMASE-i program under Award No. DMR-1906325. We acknowledge the use of the computing facilities of the Center for Scientific Computing at UC Santa Barbara supported by NSF Grant No. CNS 1725797 and NSF Grant No. DMR 1720256. S.M.L.T. has been supported by the National Science Foundation Graduate Research Fellowship Program under Grant No. DGE-1650114. B.R.O. and P.M.S. acknowledge financial support from the UC, Santa Barbara through the Elings Fellowship. The work at University of Science and Technology of China (USTC) was supported by the USTC start-up fund and Fundamental Research Funds for the Central Universities (Grants No. WK3510000008 and No. WK3510000012). Any opinions, findings, and conclusions or recommendations expressed in this material are those of the authors and do not necessarily reflect the views of the National Science Foundation.

Funders	Funder number
Center for Scientific Computing at UC Santa Barbara
UC Santa Barbara NSF	DMR-1906325
National Science Foundation	CNS 1725797, DMR 1720256, DGE-1650114
University of California
University of California, Santa Barbara
University of Science and Technology of China
Fundamental Research Funds for the Central Universities	WK3510000012, WK3510000008

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10.1103/PhysRevB.104.235139

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title = "Electronic properties of the topological kagome metals YV6Sn6 and GdV6Sn6",

abstract = "The synthesis and characterization of vanadium-based kagome metals YV6Sn6 and GdV6Sn6 are presented. X-ray diffraction, magnetization, magnetotransport, and heat capacity measurements reveal an ideal kagome network of V ions coordinated by Sn and separated by triangular lattice planes of rare-earth ions. The onset of low-temperature magnetic order of Gd spins is detected in GdV6Sn6 and is suggested to be noncollinear, while V ions in both compounds remain nonmagnetic. Density functional theory calculations are presented modeling the band structures of both compounds, which can be classified as Z2 topological metals in the paramagnetic state. Both compounds exhibit high mobility, multiband transport and present an interesting platform for controlling the interplay between magnetic order associated with the R-site sublattice and nontrivial band topology associated with the V-based kagome network. Our results invite future exploration of other RV6Sn6 (R = rare earth) variants where this interplay can be tuned via R-site substitution.",

author = "Ganesh Pokharel and Teicher, {Samuel M.L.} and Ortiz, {Brenden R.} and Sarte, {Paul M.} and Guang Wu and Shuting Peng and Junfeng He and Ram Seshadri and Wilson, {Stephen D.}",

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AU - Teicher, Samuel M.L.

AU - Ortiz, Brenden R.

AU - Sarte, Paul M.

AU - Wu, Guang

AU - Peng, Shuting

AU - He, Junfeng

AU - Seshadri, Ram

AU - Wilson, Stephen D.

PY - 2021/12/15

Y1 - 2021/12/15

N2 - The synthesis and characterization of vanadium-based kagome metals YV6Sn6 and GdV6Sn6 are presented. X-ray diffraction, magnetization, magnetotransport, and heat capacity measurements reveal an ideal kagome network of V ions coordinated by Sn and separated by triangular lattice planes of rare-earth ions. The onset of low-temperature magnetic order of Gd spins is detected in GdV6Sn6 and is suggested to be noncollinear, while V ions in both compounds remain nonmagnetic. Density functional theory calculations are presented modeling the band structures of both compounds, which can be classified as Z2 topological metals in the paramagnetic state. Both compounds exhibit high mobility, multiband transport and present an interesting platform for controlling the interplay between magnetic order associated with the R-site sublattice and nontrivial band topology associated with the V-based kagome network. Our results invite future exploration of other RV6Sn6 (R = rare earth) variants where this interplay can be tuned via R-site substitution.

AB - The synthesis and characterization of vanadium-based kagome metals YV6Sn6 and GdV6Sn6 are presented. X-ray diffraction, magnetization, magnetotransport, and heat capacity measurements reveal an ideal kagome network of V ions coordinated by Sn and separated by triangular lattice planes of rare-earth ions. The onset of low-temperature magnetic order of Gd spins is detected in GdV6Sn6 and is suggested to be noncollinear, while V ions in both compounds remain nonmagnetic. Density functional theory calculations are presented modeling the band structures of both compounds, which can be classified as Z2 topological metals in the paramagnetic state. Both compounds exhibit high mobility, multiband transport and present an interesting platform for controlling the interplay between magnetic order associated with the R-site sublattice and nontrivial band topology associated with the V-based kagome network. Our results invite future exploration of other RV6Sn6 (R = rare earth) variants where this interplay can be tuned via R-site substitution.

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Electronic properties of the topological kagome metals YV6Sn6 and GdV6Sn6

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