Orbitally induced Peierls state in spinels.
作者： D. I. Khomskii , T. Mizokawa
DOI: 10.1103/PHYSREVLETT.94.156402
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摘要: We consider the superstructures, which can be formed in spinels containing on B sites transition-metal ions with partially filled t(2g) levels. show that, when such systems are close to itinerant state (e.g., have an insulator-metal transition), there may appear them orbitally driven Peierls state. explain by this mechanism very unusual superstructures observed CuIr2S4 (octamers) and MgTi2O4 (chiral superstructures) suggest that a similar phenomenon should NaTiO2 possibly some other systems.
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