Researchers manage to split the energy levels between valleys in a 2D semiconductor

Researchers from the University at Buffalo discovered a new way to split the energy levels between the valleys in a two-dimensional semiconductor. The researchers used a ferromagnetic compound to pull the valleys apart and keep them at different energy levels - which enables an increase in the separation of the energy in the valley by a factor of 10 compared to an external magnetic field.

The whole device is a two-layered hterostructure made from a 10-nm thick film of europoium sulfide (EuS) which is magnetic and a single layer (