Dynamically generated dimension reduction and crossover in a spin orbital model

De Silva, Theja. N.; Ma, Michael; Zhang, Fu Chun

Dynamically generated dimension reduction and crossover in a spin orbital model

Authors

De Silva, Theja. N.

Ma, Michael

Zhang, Fu Chun

Description

We study a spin orbital model in which the spin-spin interaction couples linearly to the orbital isospin. Fluctuations drive the transition from paramagnetic state to C type ordered state into a strongly first order one, as observed in $V_2O_3$. At T=0, there is a FOCS to FOGS transition. Close to the transition point, the system shows dynamically generated dimension reduction and crossover, resulting in one or more spin reentrant transitions.
Submitted to PRL. 4 pages and one figure