Abstract
The electronic structure of Ni2P(10-10) has been investigated by angle-resolved photoemission spectroscopy (ARPES) utilizing synchrotron radiation. The surface prepared by Ar+ ion sputtering (3 kV, 15 min) and annealing (400°C) gave a c(2×4) low-energy electron diffraction pattern. The ARPES measurements on this surface showed that there were at least three surface states. One was observed at about 0.4 eV around the Γ point, and the state was found to be formed in a (1×1) region which is coexistent with a c(2×4) region on the surface. The other two states were observed in the vicinity of the Fermi level around the Γ point and at about 0.6 eV at k∥ ≥ 2 nm−1 along the [-12-10] direction. These states grew with the progress of segregation of P atoms, and were assigned as the states formed in the c(2×4) region. [DOI: 10.1380/ejssnt.2014.175]
