In this work a complete valence-band structure of $\alpha -{\mathrm{MoTe}}_2$ using angular-resolved photoelectron spectroscopy (ARPES) with synchrotron radiation is presented. The dispersion along the perpendicular component $k_{\perp }$ of the wave vector is found to be non-negligible for a number of states, especially at higher binding energies. The effect of this $k_{\perp }$ dispersion on the determination of the exact dispersion of the individual states along $k_{\Vert }$ is discussed. By performing ARPES in the constant-final-state mode for off-normal emission spectra, at least the $k_{\Vert }$ component can be determined unequivocally. Comparison of theoretical calculations with the resulting experimental valence-band structure shows partial agreement.

• Received 5 June 1998

DOI:https://doi.org/10.1103/PhysRevB.60.4675