On two phases inside the Bose condensation dome of Yb$_2$Si$_2$O$_7

Phys. Rev. Lett. 126, 067201 (2021) Recent experimental data on Bose-Einstein Condensation (BEC) of magnons in the spin-gap compound Yb$_2$Si$_2$O$_7$ revealed an asymmetric BEC dome arXiv:1810.13096v2. We examine modifications to the Heisenberg model on a breathing honeycomb lattice, showing that t...

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Bibliographic Details
Main Authors Flynn, Michael O, Baker, Thomas E, Jindal, Siddharth, Singh, Rajiv R. P
Format Journal Article
LanguageEnglish
Published 22.01.2020
Subjects
Physics - Strongly Correlated Electrons
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Summary:Phys. Rev. Lett. 126, 067201 (2021) Recent experimental data on Bose-Einstein Condensation (BEC) of magnons in the spin-gap compound Yb$_2$Si$_2$O$_7$ revealed an asymmetric BEC dome arXiv:1810.13096v2. We examine modifications to the Heisenberg model on a breathing honeycomb lattice, showing that this physics can be explained by competing forms of weak anisotropy. We employ a gamut of analytical and numerical techniques to show that the anisotropy yields a field driven phase transition from a state with broken Ising symmetry to a phase which breaks no symmetries and crosses over to the polarized limit.
DOI:10.48550/arxiv.2001.08219