Imagine you and your friend are playing with spinning tops. When your spinning top gets close to your friend’s spinning top, they start to affect each other’s movements. This is kind of like spin-exchange interaction.
In atoms, there are small particles called electrons that spin like tops. Spin-exchange interaction happens when two electrons get close to each other and their spins start to affect each other.
When two electrons are spinning in opposite directions, they are attracted to each other and can stick together – this is called spin attraction. When two electrons are spinning in the same direction, they repel each other and push apart – this is called spin repulsion.
Scientists can use spin-exchange interaction to study and control the behaviour of electrons in materials. By manipulating the spins of electrons, they can create new kinds of electronics and computer technologies that are faster and more efficient.