Frustrated quantum Heisenberg double-tetrahedral and octahedral chains at high magnetic fields

Abstract

We consider the spin-1/2 antiferromagnetic Heisenberg model on two one-dimensional frustrated lattices, double-tetrahedral chain and octahedral chain, with almost dispersionless (flat) lowest magnon band in a strong magnetic field. Using the localized magnons picture, we construct an effective description of the one-dimensional chains with triangle and square traps within the strong coupling approximation. We perform extensive exact diagonalization and density matrix renormalization group calculations to check the validity of the obtained effective Hamiltonians by comparison with the initial models with special focus on the magnetization and specific heat at high magnetic fields.

arXiv comment9 pages, 7 figures

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Cited by in corpus (3)

• Low temperature pseudo-phase transition in an extended Hubbard diamond chain
• Magnetic properties of a capped kagome molecule with 60 quantum spins
• Investigation of entanglement measures across the magnetization process of a highly frustrated spin-1/2 Heisenberg octahedral chain as a new paradigm of the localized-magnon approach