https://www.colorado.edu/faculty/zunger-matter-by-design/2015/02/27/intrinsic-circular-polarization-centrosymmetric-stacks-transition-metal-dichalcogenide
Intrinsic Circular Polarization in Centrosymmetric Stacks of Transition-Metal Dichalcogenide...
Physical Review Letters 114, 087402 (2015)
circular polarizationtransition metalintrinsiccentrosymmetricstacks