Realization of a Spin-1/2 Hexagonal-Plaquette Chain with Ising-Like Anisotropy

Abstract

We present the realization of a spin-1/2 hexagonal-plaquette chain with Ising anisotropy, an unexplored quantum spin model that serves as a platform for investigating anisotropic quantum magnetism. Specific heat at zero field reveals a sharp peak at $T_{\mathrm{N}}$ = 1.0 K, indicating a phase transition to a N$\acute{\mathrm{e}}$el order stabilized by interchain couplings. A perturbative analysis maps the system onto an effective spin-1/2 Ising-like chain, supporting the presence of an anisotropy-induced excitation gap. Furthermore, the interchain interactions may induce discrete excitations in the spinon continuum, reminiscent of Zeeman ladder physics observed in related 1D Ising-like systems. These results establish a well-defined model system for correlated spin phenomena in anisotropic magnets and highlight a route for engineering Ising-like quantum states in molecular-based frameworks.

arXiv comment8 pages, 3 figures

References in corpus (13)

• Dynamics of coupled quantum spin chains
• Topological quantum phase transition in the Ising-like antiferromagnetic spin chain BaCo${}_2$V${}_2$O${}_8$
• Spinon confinement in a quasi one dimensional anisotropic Heisenberg magnet
• Longitudinal and Transverse Zeeman Ladders in the Ising-Like Chain Antiferromagnet BaCo2V2O8
• Novel ordering of an S = 1/2 quasi one-dimensional Ising-like anitiferromagnet in magnetic field
• Spinon Confinement in the One-Dimensional Ising-Like Antiferromagnet SrCo2V2O8
• Longitudinal SDW order in a quasi-1D Ising-like quantum antiferromagnet
• Quantum criticality of the Ising-like screw chain antiferromagnet SrCo2V2O8 in a transverse magnetic field
• Quantum magnetic properties of the spin-1/2 triangular-lattice antiferromagnet Ba${}_2$La${}_2$CoTe${}_2$O${}_{12}$
• Various regimes of quantum behavior in S = 1/2 Heisenberg antiferromagnetic chain with fourfold periodicity
• Field-induced incommensurate phase in the strong-rung spin ladder with ferromagnetic legs
• Observation of thermodynamics originating from a mixed-spin ferromagnetic chain
• Experimental observation of repulsively bound magnons