@article{CTT100608804,
  author = {T. Makino and Y. Segawa and S. Yoshida and A. Tsukazaki and A. Ohtomo and M. Kawasaki and H. Koinuma},
  title = {Spectral shape analysis of ultraviolet luminescence in n-type ZnO : Ga},
  journal = {Journal of Applied Physics},
  year = 2005,
}

@article{CTT100608803,
  author = {T. Makino and Y. Segawa and S. Yoshida and A. Tsukazaki and A. Ohtomo and M. Kawasaki and H. Koinuma},
  title = {Free-carrier effects on zero- and one-phonon absorption onsets of n-type ZnO},
  journal = {Japanese Journal of Applied Physics Part 1-Regular Papers Brief Communications & Review Papers},
  year = 2005,
}

@article{CTT100608802,
  author = {T. Makino and Y. Segawa and S. Yoshida and A. Tsukazaki and A. Ohtomo and M. Kawasaki},
  title = {Gallium concentration dependence of room-temperature near-band-edge luminescence in n-type ZnO : Ga},
  journal = {Applied Physics Letters},
  year = 2004,
}

@article{CTT100609466,
  author = {A. Tsukazaki and A. Ohtomo and S. Yoshida and M. Kawasaki and C. H. Chia and T. Makino and Y. Segawa and T. Koida and S. F. Chichibu and H. Koinuma},
  title = {Layer-by-layer growth of high-optical-quality ZnO film on atomically smooth and lattice relaxed ZnO buffer layer},
  journal = {Applied Physics Letters},
  year = 2003,
}