Natural birefringence of cubic CuBr crystals in the exciton part of the spectrum
Gogolin O. V., Tsitsishvili E. G., Deiss J. L., Klingshirn C., Solomko V. E.
A birefringence of cubic crystals in the exciton part of the spectrum resulting from a difference in the translational masses of the transverse excitons has been detected experimentally for the first time.