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Updated: May 29, 2026
Methods of Ex Situ and In Situ Investigations of Structural Transformations: The Case of Crystallization of Metallic Glasses
Published on: June 7, 2018
Manifestations of bound-magnon crystal, uniform and cluster-based Haldane states in a spin-1 Heisenberg diamond chain
Azam Zoshki1, Hamid Arian Zad1, Jozef Strecka1
1Department of Theoretical Physics and Astrophysics, Faculty of Science, P. J. Šafárik University, Park Angelinum 9, 040 01 Košice, Slovakia.
Abstract:
Magnetic and thermodynamic properties of the antiferromagnetic spin-1 Heisenberg diamond chain in an external magnetic field are explored using an extended localized-magnon theory complemented by exact diagonalization. We focus on the low-temperature magnetization process, thermodynamic quantities, and magnetocaloric effect in a moderately frustrated regime, where the system hosts a rich variety of unconventional quantum phases including the uniform and cluster-based Haldane states, the fully fragmented monomer-dimer phase, and the bound-magnon crystal preceding the full magnetic saturation. The localized-magnon approach elaborated in our recent work is extended here to account for the uniform Haldane phase, thereby allowing the lattice-gas description to be generalized from the highly frustrated to the moderately frustrated regime. The resulting monomer-dimer lattice-gas model captures anomalous features of the magnetization, susceptibility, entropy, specific heat, and magnetic Grüneisen parameter near field-driven transitions between the quantum phases manifested as zero, one-sixth, one-third, and two-thirds magnetization plateaus.
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