Magnetic structure of spin orbit coupled transition metal chains in Ca4RhO6 and Sr4IrO6
We are interested in the physics of strongly spin orbit coupled transition metal oxides. For this class of materials, theoretical studies have predicted a plethora of unconventional electronic states, ranging from non-trivial band topology and novel emerging quasiparticle excitations over quantum spin liquid states to unconventional superconductivity. We have synthesised two heavy transition metal oxides powder samples Ca4RhO6 and Sr4IrO6. Presently, very little is known about these rhombohedral compounds. In contrast to commonly investigated 4d and 5d transition metal oxide pyrochlores, honeycomb lattices and perovskites, the rhodium and iridium ions of the present study are arranged in quasi one-dimensional polyhedral chains. We believe that this low dimensionality adds to the potential for unconventional electronic phenomena. We here propose the first attempt to determine the magnetic structure of these correlated, spin orbit coupled, metallic chains. Our study will form a basis to perform more advanced investigations (e.g. of the magnetic excitation spectrum).
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Marein C. Rahn; BOOTHROYD Andrew Timothy; GUO Yanfeng; MCMORROW Desmond Francis; PRINCEP Andrew and SUARD Emmanuelle. (2015). Magnetic structure of spin orbit coupled transition metal chains in Ca4RhO6 and Sr4IrO6. Institut Laue-Langevin (ILL) doi:10.5291/ILL-DATA.5-31-2363
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