PHONON SPECTROSCOPY OF CHROMIUM-DOPED GALLIUM ARSENIDE USING SUPERCONDUCTING TUNNEL JUNCTIONS M. Hamdache, P. J. King, D. T. Murphy et V. W. RamptonJ. Phys. Colloques, 42 C6 (1981) C6-664-C6-666DOI: https://doi.org/10.1051/jphyscol:19816194