Electronic properties and phase transition in 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, 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 Yb0.5Co3Ge3 and find a temperature-dependent kink in the resistivity that is highly similar to the AV3Sb5 behavior and is commensurate with an in-plane structural distortion of the Co Kagome lattice along with a doubling of the c-axis. The space group is found to lower from P6/mmm to P63/m below the transition temperature, breaking the in-plane mirror planes and C6 rotation, 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.

References in corpus (38)

• Quantum Spin Liquid States
• CsV${}_3$Sb${}_5$: a ${\mathbb{Z}}_2$ topological kagome metal with a superconducting ground state
• Discovery of unconventional chiral charge order in kagome superconductor KV3Sb5
• Dirac fermions and flat bands in the ideal kagome metal FeSn
• Roton pair density wave and unconventional strong-coupling superconductivity in a topological kagome metal
• Cascade of correlated electron states in a kagome superconductor CsV3Sb5
• Unconventional Fermi surface instabilities in the Kagome Hubbard Model
• Competing electronic orders on Kagome lattices at van Hove filling
• Superconductivity in the ${\mathbb{Z}}_2$ kagome metal KV${}_3$Sb${}_5$
• Double superconducting dome and triple enhancement of Tc in the kagome superconductor CsV3Sb5 under high pressure
• Concurrence of anomalous Hall effect and charge density wave in a superconducting topological kagome metal
• Unusual competition of superconductivity and charge-density-wave state in a compressed topological kagome metal
• Use of frit-disc crucibles for routine and exploratory solution growth of single crystalline samples
• Chiral flux phase in the Kagome superconductor AV${}_3$Sb${}_5$
• Analysis of Charge Order in the Kagome Metal $A$V${}_3$Sb${}_5$ ($A=$K,Rb,Cs)
• Discovery of charge density wave in a correlated kagome lattice antiferromagnet
• Correlation-driven chiral superconductivity and chiral spin order in doped kagome lattice
• Sublattice Interference in the Kagome Hubbard Model
• Fermi surface mapping and the nature of charge density wave order in the kagome superconductor CsV${}_3$Sb${}_5$
• Kagome superconductors AV${}_3$Sb${}_5$ (A=K, Rb, Cs)
• Complex charge density waves at Van Hove singularity on hexagonal lattices: Haldane-model phase diagram and potential realization in kagome metals ${\text{AV}}_3{\text{Sb}}_5$
• Novel magnetic states and nematic spin chirality in the kagome lattice metal YMn${}_6$Sn${}_6$
• Multiband superconductivity with sign-preserving order parameter in kagome superconductor CsV3Sb5
• Twofold symmetry of $c$-axis resistivity in topological kagome superconductor CsV${}_3$Sb${}_5$ with in-plane rotating magnetic field
• Electronic nature of chiral charge order in the kagome superconductor CsV3Sb5
• Rare earth engineering in RMn${}_6$Sn${}_6$ topological kagome magnets
• Field induced topological Hall effect in non-coplanar triangular antiferromagnetic geometry of Mn3Sn
• Fantastic flat bands and where to find them: The CoSn-type compounds
• Study of the electronic properties of topological kagome metals YV${}_6$Sn${}_6$ and GdV${}_6$Sn${}_6$
• Temperature-driven reorganization of electronic order in CsV${}_3$Sb${}_5$
• Anomalous Hall Effect in Kagome Ferrimagnet GdMn${}_6$Sn${}_6$
• Strong coupling nature of kagome superconductivity in LaRu${}_3$Si${}_2$
• Anomalous Properties in the Normal and Superconducting States of LaRu${}_3$Si${}_2$
• Magnetism and charge density waves in RNiC${}_2$ (R = Ce, Pr, Nd)
• Electronic properties of correlated kagomé metals AV${}_3$Sb${}_5$(A = K, Rb, Cs): A perspective
• Twisting of 2D kagomé sheets in layered intermetallics
• Superconductivity in kagome metal YRu3Si2 with strong electron correlations
• An electron correlation originated negative magnetoresistance in a system having a partly flat band

Cited by in corpus (10)

• Quantum states and intertwining phases in kagome materials
• Quantum Interactions in Topological R166 Kagome Magnet
• Tiny Sc allows the chains to rattle: Impact of Lu and Y doping on the charge density wave in ScV${}_6$Sn${}_6$
• Kagome metals
• Intricate magnetic landscape in antiferromagnetic kagome metal TbTi${}_3$Bi${}_4$ and interplay with Ln${}_{2-x}$Ti${}_{6+x}$Bi${}_9$ (Ln: Tb-Lu) shurikagome metals
• Three-dimensional higher-order saddle points induced flat bands in Co-based kagome metals
• Nonlinear optical response in kagome lattice with inversion symmetry breaking
• Pressure suppresses the density wave order in kagome metal LuNb${}_6$Sn${}_6$
• Weak low-temperature ferromagnetism and linear magnetoresistance in Lu${}_{0.75}$Fe${}_6$Sn${}_6$ with a disordered HfFe${}_6$Ge${}_6$-type structure
• Revealing magnetism in the distorted kagome $R$Ti${}_3$Bi${}_4$ ($R$ = Nd, Sm, Gd) via ARPES and XMCD