2020/01/31 by Michael O. Flynn, Thomas E. Baker, Siddharth Jindal +1 · 10 citations
Physics and Astronomy · #Advanced Condensed Matter Physics #Anisotropy #Bose–Einstein condensate #Condensed matter physics #Ising model #Phase transition #Physics #Physics of Superconductivity and Magnetism #Quantum many-body systems #Quantum mechanics #cond-mat.str-el
paper · pdf · doi:10.1103/physrevlett.126.067201
published in Physical Review Letters 126(6), 067201 (American Physical Society)
openalex created_date 2020/01/30 · arxiv created 2020/10/03 · openalex publication_date 2021/02/12 · arxiv updated 2021/02/17 · openalex updated_date 2026/08/05
Recent experimental data on Bose-Einstein condensation of magnons in the spin-gap compound Yb2Si2O7 revealed an asymmetric Bose-Einstein condensation dome [G. Hester et al., Phys. Rev. Lett. 123, 027201 (2019)PRLTAO0031-900710.1103/PhysRevLett.123.027201]. We examine modifications to the Heisenberg model on a breathing honeycomb lattice, showing that this physics can be explained by competing anisotropic perturbations. 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 that breaks no symmetries and crosses over to the polarized limit.