Van der Waals lattice-induced colossal magnetoresistance in Cr2Ge2Te6 thin flakes

Abstract

Due to their layered structure, and resulting weak interlayer exchange coupling, van der Waals materials can exhibit distinct behaviour depending on whether the spins are aligned in the plane, or perpendicular. Here, via magnetoresistance measurements, Zhu et al provide direct evidence of a magneto-band-structure effect due to the alignment of the spin in the van der Waals magnet, Cr2Ge2Te6.