Absence of Jahn-Teller transition in the hexagonal Ba3CuSb2O9 single crystal

Abstract

We present a comprehensive structural study on perovskite-type 6H-Ba3CuSb2O9, which exhibits a spin-orbital short-range ordering on a honeycomb-based lattice. By combining synchrotron x-ray diffraction, electron spin resonance, ultrasound measurement and Raman spectroscopy, we found that the static Jahn-Teller distortion is absent down to the lowest temperature in the present material, indicating orbital ordering is strongly suppressed. We discuss such an unusual state is realized with the help of spin degree of freedom, leading to a spin-orbital entangled liquid state.

12 pages, 6 figures, submitted to PRL

References in corpus (10)

• Spin Dynamics of the Spin-1/2 Kagome Lattice Antiferromagnet ZnCu_3(OH)_6Cl_2
• Spin-Liquid State in the S = 1/2 Hyperkagome Antiferromagnet Na4Ir3O8
• Spin-orbital quantum liquid on the honeycomb lattice
• A Spin-Orbital Singlet and Quantum Critical Point on the Diamond Lattice: FeSc2S4
• Frustration and entanglement in the $t_{2g}$ spin--orbital model on a triangular lattice: valence--bond and generalized liquid states
• Orbital liquid in ferromagnetic manganites: The orbital Hubbard model for $e_g$ electrons
• Doubly degenerate orbital system in honeycomb lattice: implication of orbital state in layered iron oxide
• Exploring the spin-orbital ground state of Ba3CuSb2O9
• Spin-orbiton and quantum criticality in FeSc2S4
• Resonating Valence-Bond State in an Orbitally Degenerate Quantum Magnet with Dynamical Jahn-Teller Effect

Cited by in corpus (25)

• Orbital effects in solids: basics, recent progress and opportunities
• The Chemistry of Quantum Spin Liquids
• Hexagonal Perovskites as Quantum Materials
• Thermal Hall effect in a phonon-glass Ba${}_3$CuSb${}_2$O${}_9$
• Short range order in the quantum XXZ honeycomb lattice material BaCo${}_2$(PO${}_4$)${}_2$
• Randomness-induced quantum spin liquid behavior in the s=1/2 random J1-J2 Heisenberg antiferromagnet on the honeycomb lattice
• SU(4) Heisenberg model on the honeycomb lattice with exchange-frustrated perturbations: implications for twistronics and Mott insulators
• Frustrated spin-1/2 molecular magnetism in the mixed-valence antiferromagnets Ba3MRu2O9 (M = In, Y, Lu)
• Spin glass behavior in frustrated quantum spin system CuAl2O4 with a possible orbital liquid state
• Disorder driven spin-orbital liquid behaviour in the Ba${}_3$XSb${}_2$O${}_9$ materials
• Multiflavor Mott insulators in quantum materials and ultracold atoms
• Observation of the orbital quantum dynamics in the spin-1/2 hexagonal antiferromagnet Ba3CuSb2O9
• Quantum entanglement in the one-dimensional spin-orbital SU(2)$\otimes XXZ$ model
• Evidence of quantum spin liquid state in a Cu${}^{2+}$-based $S=1/2$ triangular lattice antiferromagnet
• Short-range order and increased transition temperature in LiVO2 with weakened trimer frustration
• High-field Magnetism of the Honeycomb-lattice Antiferromagnet Cu${}_2$(pymca)${}_3$(ClO${}_4$)
• Spin-Orbital Entangled Liquid State in the Copper Oxide Ba${}_3$CuSb${}_2$O${}_9$
• Microscopic Roadmap to a Yao-Lee Spin-Orbital Liquid
• Green's function variational approach to orbital polarons in KCuF3
• Spin Transport in Quantum Spin-Orbital Liquids
• Cu-Sb dumbbell arrangement in the spin-orbital liquid candidate Ba${}_3$CuSb${}_2$O${}_9$
• Spin-orbital liquid in Ba${}_3$CuSb${}_2$O${}_9$ stabilized by oxygen holes
• Exciton-spin interactions in antiferromagnetic charge-transfer insulators
• Reexamination of the charge-ordered dimer pattern in the spinel compound CuIr2S4 using single-crystal synchrotron x-ray diffraction
• Spin-correlation Driven Ferroelectric Quantum Criticality in a Perovskite Quantum Spin-liquid System, Ba3CuSb2O9