Electronic Properties and Phase Transition in the Kagome Metal Yb0.5Co3Ge3

Yaojia Wang; Gregory T. McCandless; Xiaoping Wang; Kulatheepan Thanabalasingam; Heng Wu; Damian Bouwmeester; Herre S.J. Van Der Zant; Mazhar N. Ali; Julia Y. Chan

doi:10.1021/acs.chemmater.2c01309

Electronic Properties and Phase Transition in the Kagome Metal Yb_0.5Co₃Ge₃

Yaojia Wang, Gregory T. McCandless, Xiaoping Wang, Kulatheepan Thanabalasingam, Heng Wu, Damian Bouwmeester, Herre S.J. Van Der Zant, Mazhar N. Ali, Julia Y. Chan

Single Crystal Diffraction

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Abstract

The Kagome lattice is an important fundamental structure in condensed matter physics for investigating the interplay of electron correlation, topology, and frustrated magnetism. Recent work on Kagome metals in the AV₃Sb₅(A = K, Rb, and Cs) family has shown a multitude of correlation-driven distortions, including symmetry breaking charge density waves and nematic superconductivity at low temperatures. Here, we study the new Kagome metal Yb_0.5Co₃Ge₃and find a temperature-dependent kink in the resistivity that is highly similar to the AV₃Sb₅behavior and is commensurate with an in-plane structural distortion of the Co Kagome lattice along with a doubling of the c-axis. The symmetry is lower below the transition temperature, with a breaking the in-plane mirror planes and C₆rotation, while gaining a screw axis along the c-direction. At very low temperatures, anisotropic negative magnetoresistance is observed, which may be related to anisotropic magnetism. This raises questions about the types of the distortions in Kagome nets and their resulting physical properties including superconductivity and magnetism.

Original language	English
Pages (from-to)	7337-7343
Number of pages	7
Journal	Chemistry of Materials
Volume	34
Issue number	16
DOIs	https://doi.org/10.1021/acs.chemmater.2c01309
State	Published - Aug 23 2022

Funding

Y.W. acknowledges the support from NWO Talent Program Veni financed by the Dutch Research Council (NWO), project no. VI.Veni.212.146. A portion of this research used resources at the Spallation Neutron Source, a Department of Energy Office of Science User Facility operated by the Oak Ridge National Laboratory. J.Y.C. acknowledges NSF-DMR 2209804 and Welch AT-2056-20210327 for partial support of this work. M.N.A. acknowledges support from the Kavli Institute of Nanoscience Delft and the Faculty of Applied Sciences at TU Delft and the Max Planck Institute for Microstructure Physics Halle. A portion of this research was supported by the Netherlands Organisation for Scientific Research (NWO/OCW), as part of the Frontiers of Nanoscience program.

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title = "Electronic Properties and Phase Transition in the Kagome Metal Yb0.5Co3Ge3",

abstract = "The Kagome lattice is an important fundamental structure in condensed matter physics for investigating the interplay of electron correlation, topology, and frustrated magnetism. Recent work on Kagome metals in the AV3Sb5(A = K, Rb, and Cs) family has shown a multitude of correlation-driven distortions, including symmetry breaking charge density waves and nematic superconductivity at low temperatures. Here, we study the new Kagome metal Yb0.5Co3Ge3and find a temperature-dependent kink in the resistivity that is highly similar to the AV3Sb5behavior and is commensurate with an in-plane structural distortion of the Co Kagome lattice along with a doubling of the c-axis. The symmetry is lower below the transition temperature, with a breaking the in-plane mirror planes and C6rotation, while gaining a screw axis along the c-direction. At very low temperatures, anisotropic negative magnetoresistance is observed, which may be related to anisotropic magnetism. This raises questions about the types of the distortions in Kagome nets and their resulting physical properties including superconductivity and magnetism.",

author = "Yaojia Wang and McCandless, {Gregory T.} and Xiaoping Wang and Kulatheepan Thanabalasingam and Heng Wu and Damian Bouwmeester and {Van Der Zant}, {Herre S.J.} and Ali, {Mazhar N.} and Chan, {Julia Y.}",

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AU - Wang, Xiaoping

AU - Thanabalasingam, Kulatheepan

AU - Wu, Heng

AU - Bouwmeester, Damian

AU - Van Der Zant, Herre S.J.

AU - Ali, Mazhar N.

AU - Chan, Julia Y.

PY - 2022/8/23

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N2 - The Kagome lattice is an important fundamental structure in condensed matter physics for investigating the interplay of electron correlation, topology, and frustrated magnetism. Recent work on Kagome metals in the AV3Sb5(A = K, Rb, and Cs) family has shown a multitude of correlation-driven distortions, including symmetry breaking charge density waves and nematic superconductivity at low temperatures. Here, we study the new Kagome metal Yb0.5Co3Ge3and find a temperature-dependent kink in the resistivity that is highly similar to the AV3Sb5behavior and is commensurate with an in-plane structural distortion of the Co Kagome lattice along with a doubling of the c-axis. The symmetry is lower below the transition temperature, with a breaking the in-plane mirror planes and C6rotation, while gaining a screw axis along the c-direction. At very low temperatures, anisotropic negative magnetoresistance is observed, which may be related to anisotropic magnetism. This raises questions about the types of the distortions in Kagome nets and their resulting physical properties including superconductivity and magnetism.

AB - The Kagome lattice is an important fundamental structure in condensed matter physics for investigating the interplay of electron correlation, topology, and frustrated magnetism. Recent work on Kagome metals in the AV3Sb5(A = K, Rb, and Cs) family has shown a multitude of correlation-driven distortions, including symmetry breaking charge density waves and nematic superconductivity at low temperatures. Here, we study the new Kagome metal Yb0.5Co3Ge3and find a temperature-dependent kink in the resistivity that is highly similar to the AV3Sb5behavior and is commensurate with an in-plane structural distortion of the Co Kagome lattice along with a doubling of the c-axis. The symmetry is lower below the transition temperature, with a breaking the in-plane mirror planes and C6rotation, while gaining a screw axis along the c-direction. At very low temperatures, anisotropic negative magnetoresistance is observed, which may be related to anisotropic magnetism. This raises questions about the types of the distortions in Kagome nets and their resulting physical properties including superconductivity and magnetism.

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Electronic Properties and Phase Transition in the Kagome Metal Yb_0.5Co₃Ge₃

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