Question

In what circumstances, can exchange interaction acquire temperature dependence?

Answer 1

exchange interaction" is a loose term which does not make a proper definite answer to the question very easy. We can talk about Coulomb exchange, kinetic exchange, direct or double exchange etc... This being said, in all these mechanisms, the temperature dependence is driven by the statistics of the fermions, while the associated interactions (Coulomb interaction) or the Pauli exclusion principle, are temperature independent. For interesting insights into the intricacies of the exchange interactions, I would highly recommend the book chapter by Erik Koch

Answer 2

Explanation:

Heisenberg exchange interaction (sometimes called as magnetic stiffness?), originating from the Coulomb interaction and the Fermion statistics, is widely .