Although only a few 2D materials have been predicted to possess ferroelectricity, 2D
ferroelectrics are expected to play a dominant role in the upcoming nano era as important …

Valley, the energy extrema in the electronic band structure at momentum space, is regarded
as a new degree of freedom of electrons, in addition to charge and spin. The studies focused …

The emergence of 2D polarized materials, including ferromagnetic, ferrovalley, and
ferroelectric materials, has demonstrated unique quantum behaviors at atomic scales. These …

Engineering the valley index is essential and highly sought for valley physics, but currently, it
is exclusively based on the paradigm of the challenging ferrovalley with spin-orientation …

Recently, the concept of ferrovalley materials has been proposed. These systems, in which
ferromagnetism or ferroelectricity triggers spontaneous valley polarization, can be applied to …