We have studied the nature of the three-dimensional multi-band electronic structure in the twodimensional triangular lattice Ir1-xPtxTe2 (x=0.05) superconductor using angle-resolved photoemission spectroscopy (ARPES), x-ray photoemission spectroscopy (XPS) and band structure calculation. ARPES results clearly show a cylindrical (almost two-dimensional) Fermi surface around the zone center. Near the zone boundary, the cylindrical Fermi surface is truncated into several pieces in a complicated manner with strong three-dimensionality. The XPS result and the band structure calculation indicate that the strong Te 5p-Te 5p hybridization between the IrTe2 triangular lattice layers is responsible for the three-dimensionality of the Fermi surfaces and the intervening of the Fermi surfaces observed by ARPES.
@article{arxiv.1312.0780,
title = {Te 5p orbitals bring three-dimensional electronic structure to two-dimensional Ir0.95Pt0.05Te2},
author = {D. Ootsuki and T. Toriyama and M. Kobayashi and S. Pyon and K. Kudo and M. Nohara and K. Horiba and M. Kobayashi and K. Ono and H. Kumigashira and T. Noda and T. Sugimoto and A. Fujimori and N. L. Saini and T. Konishi and Y. Ohta and T. Mizokawa},
journal= {arXiv preprint arXiv:1312.0780},
year = {2014}
}