Photoinduced Magnetic Transitions and Excitonic Order Enhancement in Spin Crossover Strongly Correlated Electron Systems

TL;DR

This paper investigates how photoinduced effects can enhance magnetic and excitonic orders in strongly correlated spin crossover systems, revealing a new cooperative mechanism involving electron-phonon and exchange interactions.

Contribution

It introduces a novel mechanism for exciton and magnetic order enhancement driven by photoexcitation, involving collective phase modes and electron-phonon interactions.

Findings

Photoinduced magnetic and excitonic order enhancement demonstrated.

A new cooperative mechanism involving electron-phonon and exchange interactions identified.

Presence of a massive collective phase mode linked to order enhancement.

Abstract

The effects associated with exciton Bose condensate formation in strongly correlated spin crossover systems are considered within the effective Hamiltonian obtained from the two-orbital Hubbard-Kanamori model. The collective excitations spectrum at various points of the temperature-crystal field phase diagram is calculated. The role of the electron-phonon interaction is discussed. The exciton and magnetic order photoenhancement (induction) in strongly correlated spin crossover systems a new mechanism based on the cooperative effect of electron-phonon and interatomic exchange interactions and the appearance of a massive collective phase mode is demonstrated.