2007/02/28 by O. Rösch, Oliver Rösch, Matthias Vojta · 2 citations
Physics and Astronomy · #Advanced Condensed Matter Physics #Physics of Superconductivity and Magnetism #Rare-earth and actinide compounds #cond-mat.stat-mech #cond-mat.str-el
paper · pdf · doi:10.1103/physrevb.76.180401
published as Phys. Rev. B 76, 180401(R) (2007) · 4 pages, 3 figs; (v2) final version as published
openalex publication_date 2007/11/07 · arxiv created 2007/11/08 · arxiv updated 2009/12/01 · openalex created_date 2016/06/24 · openalex updated_date 2026/07/28
For magnets with a fully frustrated interlayer interaction, we argue that the quantum phase transitions from a paramagnetic to an antiferromagnetic ground state, driven by pressure or magnetic field, are asymptotically three dimensional, due to interaction-generated nonfrustrated interlayer couplings. However, the relevant crossover scale is tiny, such that two-dimensional behavior occurs in an experimentally relevant low-temperature regime. In the pressure-driven case the phase transition may split, in which case an Ising symmetry related to interlayer bond order is broken before magnetism occurs. We discuss the relation of our results to recent experiments on BaCuSi2O6.