Infrared Investigation of Lattice Vibration in Black Phosphorus

Abstract

The lattice vibrations in black phosphorus single crystals prepared under high pressure have been studied. The transmission spectra at various temperatures in a frequency range of 100–1000 cm -1 have been measured. We have found in the spectra at 1.5 K sharp absorption peaks at 110, 132 and 474 cm -1 . By measuring the temperature, magnetic field and light-polarization dependences of the spectra and also by examining the correspondence of the observed several peaks in the spectra with the combinations of the single phonon modes, we can determine the energies of the two single infrared active phonon modes: B 1u and B 2u .