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- W4386081042 abstract "$mathrm{LiHoF_{4}}$ is a magnetic material known for its Ising-type anisotropy, making it a model system for studying quantum magnetism. However, the theoretical description of $mathrm{LiHoF_{4}}$ using the quantum Ising model has shown discrepancies in its phase diagram, particularly in the regime dominated by thermal fluctuations. In this study, we investigate the role of off-diagonal dipolar terms in $mathrm{LiHoF_{4}}$, previously neglected, in determining its properties. We analytically derive the low-energy effective Hamiltonian of $mathrm{LiHoF_{4}}$, including the off-diagonal dipolar terms perturbatively, both in the absence and presence of a transverse field. Our results encompass the full $B_{x}-T$ phase diagram, confirming the significance of the off-diagonal dipolar terms in reducing the zero-field critical temperature and determining the critical temperature's dependence on the transverse field. We also highlight the sensitivity of this mechanism to the crystal structure by comparing our calculations with the $mathrm{Fe_{8}}$ system." @default.
- W4386081042 created "2023-08-23" @default.
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- W4386081042 date "2023-08-19" @default.
- W4386081042 modified "2023-09-27" @default.
- W4386081042 title "LiHoF4 as a spin-half non-standard quantum Ising system" @default.
- W4386081042 doi "https://doi.org/10.48550/arxiv.2308.10095" @default.
- W4386081042 hasPublicationYear "2023" @default.
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