Berlin 2024 – scientific programme
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TT: Fachverband Tiefe Temperaturen
TT 49: Frustrated Magnets: Strong Spin-Orbit Coupling I
TT 49.9: Talk
Wednesday, March 20, 2024, 17:15–17:30, H 2053
Understanding the Magnetic Behavior of CoNb2O6: Insights from Ab Initio Modeling — •Amanda Konieczna1, Stephen M. Winter2, and Roser Valentí1 — 1Goethe University Frankfurt — 2Wake Forest University
The quasi-one-dimensional Ising-like system CoNb2O6 has been a subject of intense investigation, particularly regarding its microscopic model and the potential role of Kitaev interactions. Despite various experiments, the system’s magnetic behavior remains a topic of debate with different suggestions arising [1,2]. We employ an ab initio-based model to investigate CoNb2O6’s magnetism. The approach involves the modeling of an ab-initio derived Hubbard Hamiltonian and utilizing projective diagonalization techniques to construct a Spin Hamiltonian. This presentation discusses the results of our theoretical modeling approach in the context of experimental observations to give further insights into CoNb2O6’s magnetic behavior.
[1] Coldea et al., Phys. Rev. B 108 (2023) 184417
[2] Armitage et al., Nat. Phys. 17 (2021) 832
Keywords: Kitaev; Ising chain; Ab-initio