Ising spin ladders of orthopyroxene CoGeO${}_3$

Abstract

We present thermodynamic and spectroscopic measurements for an orthopyroxene CoGeO${}_3$ with magnetic Co${}^{2+}$ ions that form quasi-one-dimensional ladders. We show that non-collinear magnetic order below $T_N$=32 K can be stabilized by a strong local easy-axis anisotropy of $j_{\text{eff}}=1/2$ moments, which is induced by ligand octahedra distortions. Extraction of a magnetic Hamiltonian from inelastic neutron scattering measurements supports this interpretation and allows us to establish an effective magnetic model. The resulting exchange Hamiltonian justifies CoGeO${}_3$ as a realization of an Ising spin ladder compound.

arXiv comment7+4 pages, 5+6 figures

References in corpus (42)

• Anyons in an exactly solved model and beyond
• Wannier90 as a community code: new features and applications
• Surprises on the Way from 1D to 2D Quantum Magnets: the Novel Ladder Materials
• Strong electronic correlations from Hund's coupling
• Quantum criticality in an Ising chain: experimental evidence for emergent E8 symmetry
• Models and Materials for Generalized Kitaev Magnetism
• Linear spin wave theory for single-Q incommensurate magnetic structures
• Spin-ladders with spin gaps: A description of a class of cuprates
• Antiferromagnetic spin ladders: crossover between spin S = 1/2 and S = 1 chains
• Spin Ice, Fractionalization and Topological Order
• Pseudospin exchange interactions in d^7 cobalt compounds: Possible realization of the Kitaev model
• Correlations in a two--chain Hubbard model
• The new Cold Neutron Chopper Spectrometer at the Spallation Neutron Source - Design and Performance
• Kitaev-Heisenberg Hamiltonian for High-Spin $d^7$ Mott Insulators
• Direct Observation of Magnon Fractionalization in the Quantum Spin Ladder
• Strong quantum fluctuations in a quantum spin liquid candidate with a Co-based triangular lattice
• The Cold Neutron Chopper Spectrometer at the Spallation Neutron Source - A Review of the first 8 Years of Operation
• Spectral and thermodynamic properties of a strong-leg quantum spin ladder
• Magnetic Couplings in Edge-Sharing High-Spin $d^7$ Compounds
• Spin Supersolidity in Nearly Ideal Easy-axis Triangular Quantum Antiferromagnet Na${}_2$BaCo(PO${}_4$)${}_2$
• Spin-orbital entangled state and realization of Kitaev physics in 3d cobalt compounds: a progress report
• Duality and domain wall dynamics in a twisted Kitaev chain
• Ab initio guided minimal model for the "Kitaev" material BaCo${}_2$(AsO${}_4$)${}_2$: Importance of direct hopping, third-neighbor exchange and quantum fluctuations
• Phase diagrams of spin ladders with ferromagnetic legs
• Glide symmetry breaking and Ising criticality in the quasi-1D magnet CoNb${}_2$O${}_6$
• Bond-dependent anisotropy and magnon decay in cobalt-based Kitaev triangular antiferromagnet
• Continuum of spin excitations in an ordered magnet
• Magnetic ordering induced by interladder coupling in the spin-1/2 Heisenberg two-leg ladder antiferromagnet C${}_9$H${}_{18}$N${}_2$CuBr${}_4$
• Tuning the confinement potential between spinons in the Ising chain CoNb2O6 using longitudinal fields and quantitative determination of the microscopic Hamiltonian
• Confinement in the spectrum of a Heisenberg-Ising spin ladder
• Magnon interactions in the quantum paramagnetic phase of CoNb${}_2$O${}_6$
• Ground-state phase diagram of a spin-1/2 frustrated XXZ ladder
• Symmetry-protected topological phases and competing orders in a spin-1/2 XXZ ladder with a four-spin interaction
• Spin-flop and antiferromagnetic phases of the ferromagnetic half-twist ladder compounds Ba3Cu3In4O12 and Ba3Cu3Sc4O12
• Detecting phase boundaries of quantum spin-1/2 XXZ ladder via bipartite and multipartite entanglement transitions
• Emergent 1/3 magnetization plateaus in pyroxene CoGeO${}_3$
• Anisotropy-induced soliton excitation in magnetized strong-rung spin ladders
• Cobalt-Based Pyroxenes: A New Playground for Kitaev Physics and Ising Model Realization
• Braided Ising spin-tube physics in a purported kagome magnet
• Magnetic phase diagram in three-dimensional triangular-lattice antiferromagnet Sr${}_3$CoTa${}_2$O${}_9$ with small easy-axis anisotropy
• Single crystal growth and physical properties of pyroxene CoGeO${}_3$
• Recent Progress in Studies of Cobalt-based Quasi-1-dimensional Quantum Magnets