@article{b2a91b283ab24706afe3b557cc56eac8,
title = "Observation of momentum space semi-localization in Si-doped β-Ga 2O3",
abstract = "We performed an angle-resolved photoemission spectroscopy study of Si-doped β Ga2O3. We observed very small photoemission intensity near the Fermi level corresponding to non-dispersive states assigned to Si impurities. We show evidence for a quantization of these states that is accompanied by a confinement in the momentum space consistent with a real-space finite confinement observed in a previous scanning tunneling microscopy study. Our results suggest that this semi-localization in the conjugate spaces plays a crucial role in the electronic conduction of this material.",
author = "P. Richard and T. Sato and S. Souma and K. Nakayama and Liu, {H. W.} and K. Iwaya and T. Hitosugi and H. Aida and H. Ding and T. Takahashi",
note = "Funding Information: We are grateful to J.-P. Hu, W. Ku, and X. Dai for useful discussions. This work was supported by the Chinese Academy of Sciences (Grant No. 2010Y1JB6), the Ministry of Science and Technology of China (Grant Nos. 2010CB923000 and 2011CBA0010), the Nature Science Foundation of China (Grant Nos. 10974175, 11004232, and 11050110422), the Japan Society for the Promotion of Sciences, and MEXT of Japan. This work was based in part upon research conducted at the Synchrotron Radiation Center which was primarily funded by the University of Wisconsin-Madison with supplemental support from facility Users and the University of Wisconsin-Milwaukee.",
year = "2012",
month = dec,
day = "3",
doi = "10.1063/1.4769109",
language = "English",
volume = "101",
journal = "Applied Physics Letters",
issn = "0003-6951",
publisher = "American Institute of Physics Publising LLC",
number = "23",
}