Vibronic vs. Orbital Order in Magnetic Insulators

Explore the intricacies of vibronic and orbital order in magnetic insulators through this 35-minute conference talk delivered by Liviu Chibotaru at the Erwin Schrödinger International Institute for Mathematics and Physics. Delve into the complexities of spin-orbital exchange interactions in crystals with orbitally degenerate electronic states, and discover how the Jahn-Teller effect significantly impacts these systems. Examine the concept of spin-vibronic exchange interaction and its role in creating vibronic order, which replaces conventional orbital order in the Kugel-Khomskii model. Compare and contrast the key features of spin-vibronic exchange interaction and vibronic order with those of orbital order and spin-orbital exchange interaction. Gain insights into these phenomena through examples of insulating alkali-doped fullerides, specifically Cs3C60 and Li3(NH3)6C60, while avoiding complications related to spin-orbit coupling.