Aditya Prasad Roy, Jayakrishnan Ss, Vivek Dwij, Ashish Khandelwal, M K Chattopadhyay, Vasant Sathe, Ranjan Mittal, P U Sastry, Srungarpu N Achary, Avesh K Tyagi, Peram D Babu, Manh Duc Le, Dipanshu Bansal
Coupling of orbital degree of freedom with a spin exchange, i.e., Kugel-Khomskii-type interaction (KK), governs a host of material properties, including colossal magnetoresistance, enhanced magnetoelectric response, and photoinduced high-temperature magnetism. In general, KK-type interactions lead to deviation in experimental observables of coupled Hamiltonian near or below the magnetic transition. Using diffraction and spectroscopy experiments, here we report anomalous changes in lattice parameters, electronic states, spin dynamics, and phonons at four times the Néel transition temperature (T_{N}) in CrVO_{4}...
January 12, 2024: Physical Review Letters