Thermoreflectance spectroscopy of systems showing charge density wave transitions

The thermoreflectance spectra of 1T-TaS2, -TaSe2 and alloys of these compounds have been measured and show substantial changes at the different charge density wave transitions. The changes include the appearance of new structure and the modification of the shape and sign of the modulated spectra. These changes are due to the new gaps introduced into the band structure by the presence of a charge density wave. © 1976.