Ryan Applegate and Rajiv R. P. Singh, Cheng-Chien Chen and Thomas P. Devereaux
Phys. Rev. B 85, 054411 (2012)
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| Phenomenological phase diagram for the spin-orbital model. The exchange energy scale in the problem sets the transition temperature TO for orbital order, which in turn drives the structural transition. eps_0 is the energy scale below which long-wavelength fluctuations are suppressed. There are two separate continuous orbital and magnetic transitions for eps<<eps_0 (shown as dotted and dashed lines, respectively) and one simultaneous first-order transition for eps>>eps_0 (shown as a solid line). |
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