2009/06/30 by George Jackeli, Giniyat Khaliullin · 2 citations
Materials Science · Mathematics · Physics and Astronomy · #Advanced Condensed Matter Physics #Hamiltonian (control theory) #Ion #Magnetic and transport properties of perovskites and related materials #Mathematics #Order (exchange) #Physics #Physics of Superconductivity and Magnetism #Quantum mechanics #cond-mat.str-el
paper · pdf · doi:10.1103/physrevlett.103.067205
published as Phys. Rev. Lett. 103, 067205 (2009) · 4 pages, 3 figures; minor changes
openalex publication_date 2009/08/07 · arxiv created 2009/08/09 · arxiv updated 2009/12/01 · openalex created_date 2016/06/24 · openalex updated_date 2026/08/05
We formulate and study an effective Hamiltonian for low-energy Kramers doublets of d;1 ions on a square lattice. We find that the system exhibits a magnetically hidden order in which the expectation values of the local spin and orbital moments both vanish. The order parameter responsible for a time-reversal symmetry breaking has a composite nature and is a spin-orbital analog of a magnetic octupole. We argue that such a hidden order is realized in the layered perovskite Sr2VO4.