Kitaev honeycomb antiferromagnet in a field: quantum phase diagram for general spin

Jahromi SS, Hörmann M, Adelhardt P, Fey S, Karamnejad H, Orús R, Schmidt KP (2024)


Publication Type: Journal article

Publication year: 2024

Journal

Book Volume: 7

Article Number: 319

Journal Issue: 1

DOI: 10.1038/s42005-024-01809-0

Abstract

We use tensor-network methods and high-order linked-cluster expansions to explore the quantum phase diagram of the antiferromagnetic Kitaev honeycomb model in a magnetic field for general spin S values. Tensor network calculations for the pure Kitaev model confirm the absence of fluxes and spin-spin correlations beyond nearest neighbors, while revealing discrete orientational symmetry breaking for S ∈ 1, 3/2, 2, consistent with the semiclassical limit. An intermediate region between Kitaev phases and the high-field polarized phase is identified for all considered spin values, showing a sequence of potential phases characterized by distinct local magnetization patterns while the total magnetization increases smoothly as a function of the field. Linked-cluster expansions for the high-field zero-momentum gap and spectral weight indicate a quantum critical breakdown of the polarized phase, suggesting exotic physics at intermediate Kitaev couplings.

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How to cite

APA:

Jahromi, S.S., Hörmann, M., Adelhardt, P., Fey, S., Karamnejad, H., Orús, R., & Schmidt, K.P. (2024). Kitaev honeycomb antiferromagnet in a field: quantum phase diagram for general spin. Communications Physics, 7(1). https://doi.org/10.1038/s42005-024-01809-0

MLA:

Jahromi, Saeed S., et al. "Kitaev honeycomb antiferromagnet in a field: quantum phase diagram for general spin." Communications Physics 7.1 (2024).

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