"K. Nakahara,S. Akasaka,H. Yuji,K. Tamura,T. Fujii,Y. Nishimoto,D. Takamizu,A. Sasaki,T. Tanabe,H. Takasu,H. Amaike,T. Onuma,S. F. Chichibu,A. Tsukazaki,A. Ohtomo,M. Kawasaki","Nitrogen doped Mg<sub>x</sub>Zn<sub>1-x</sub>O/ZnO single heterostructure ultraviolet light-emitting diodes on ZnO substrates",,"Applied Physics Letters","American Institute of Physics","Vol. 97","No. 1","  013501-1-3",2010,July
"H. Yuji,K. Nakahara,K. Tamura,S. Akasaka,Y. Nishimoto,D. Takamizu,T. Onuma,S. F. Chichibu,A. Tsukazaki,A. Ohtomo,M. Kawasaki","Optimization of the growth conditions for molecular beam epitaxy of Mg<sub>x</sub>Zn<sub>1-x</sub>O (0 <= x <= 0.12) films on Zn-polar ZnO substrates",,"Japanese Journal of Applied Physics","The Japan Society of Applied Physics","Vol. 49","No. 7","  071104-1-5",2010,July
"A. Tsukazaki,A. Ohtomo,M. Kawasaki,S. Akasaka,H. Yuji,K. Tamura,K. Nakahara,T. Tanabe,A. Kamisawa,T. Gokmen,J. Shabani,M. Shayegan","Spin susceptibility and effective mass of two-dimensional electrons in Mg<sub>x</sub>Zn<sub>1-x</sub>O/ZnO heterostructures",,"Physical Review B",,"Vol. 78","No. 23","  233308-1-4",2008,Dec.
"M. Nakano,T. Makino,A. Tsukazaki,K. Ueno,A. Ohtomo,T. Fukumura,H. Yuji,S. Akasaka,K. Tamura,K. Nakahara,T. Tanabe,A. Kamisawa,M. Kawasaki","Transparent polymer Schottky contact for a high performance visible-blind ultraviolet photodiode based on ZnO",,"Applied Physics Letters",,"Vol. 93","No. 12","  123309-1-3",2008,Sept.
"Y. Nishimoto,K. Nakahara,D. Takamizu,A. Sasaki,K. Tamura,S. Akasaka,H. Yuji,T. Fujii,T. Tanabe,H. Takasu,A. Tsukazaki,A. Ohtomo,T. Onuma,S. F. Chichibu,M. Kawasaki","Plasma-assisted molecular beam epitaxy of high optical quality MgZnO films on Zn-polar ZnO substrates",,"Applied Physics Express",,"Vol. 1","No. 9","  091202-1-3",2008,Aug.
"A. Tsukazaki,H. Yuji,S. Akasaka,K. Tamura,K. Nakahara,T. Tanabe,H. Takasu,A. Ohtomo,M. Kawasaki","High electron mobility exceeding 10<sup>4</sup> cm<sup>2</sup>V<sup>-1</sup>s<sup>-1</sup> in Mg<sub>x</sub>Zn<sub>1-x</sub>O/ZnO single heterostructures grown by molecular beam epitaxy",,"Applied Physics Express",,"Vol. 1","No. 5","  055004-1-3",2008,May
"H. Yuji,K. Nakahara,K. Tamura,S. Akasaka,A. Sasaki,T. Tanabe,H. Takasu,T. Onuma,S. F. Chichibu,A. Tsukazaki,A. Ohtomo,M. Kawasaki","Mg<sub>x</sub>Zn<sub>1-x</sub>O epitaxial films grown on ZnO substrates by molecular beam epitaxy",,"Proceedings of SPIE (Zinc Oxide Materials and Devices III, edited by F. H. Teherani and C. W. Litton)",,"vol. 6895",,"p. 68950D",2008,Feb.
"A. Ohtomo,A. Tsukazaki,T. Kita,Y. Ohno,H. Ohno,K. Nakahara,H. Yuji,K. Tamura,S. Akasaka,H. Takasu,M. Kawasaki","Quantum Hall effect in ZnO","WPI & IFCAM Joint Workshop "Challenge of Interdisciplinary Materials Science to Technological Innovation of the 21st Century"",,,,,,2008,Feb.
"A. Ohtomo,S. Takagi,K. Tamura,T. Makino,Y. Segawa,H. Koinuma,M. Kawasaki","Photo-irresponsive thin-film transistor with Mg<sub>x</sub>Zn<sub>1-x</sub>O channel",,"Japanese Journal of Applied Physics Part 2-Letters & Express Letters",,"Vol. 45","No. 24-28","pp. L694-L696",2006,July
"T. Makino,K. Tamura,C. H. Chia,Y. Segawa,M. Kawasaki,A. Ohtomo,H. Koinuma","Temperature quenching of exciton luminescence intensity in ZnO/(Mg,Zn)O multiple quantum wells",,"Journal of Applied Physics",,"Vol. 93","No. 10","pp. 5929-5933",2003,May
"M. Sumiya,S. Fuke,A. Tsukazaki,K. Tamura,A. Ohtomo,M. Kawasaki,H. Koinuma","Quantitative control and detection of heterovalent impurities in ZnO thin films grown by pulsed laser deposition",,"Journal of Applied Physics",,"Vol. 93","No. 5","pp. 2562-2569",2003,May
"C.H. Chia,T. Makino,Y. Segawa,M. Kawasaki,A. Ohtomo,K. Tamura,H. Koinuma","Confinement-enhanced biexciton binding energy in ZnO/ZnMgO multiple quantum wells",,"Applied Physics Letters",,"Vol. 82","No. 12","pp. 1848-1850",2003,Apr.
"T. Makino,K. Tamura,C. H. Chia,Y. Segawa,M. Kawasaki,A. Ohtomo,H. Koinuma","Photoluminescence properties of ZnO epitaxial layers grown on lattice-matched ScAlMgO<sub>4</sub> substrates",,"Journal of Applied Physics",,"Vol. 92","No. 12","pp. 7157-7159",2002,Dec.
"T. Makino,K. Tamura,C. H. Chia,Y. Segawa,M. Kawasaki,A. Ohtomo,H. Koinuma","Size dependence of exciton-longitudinal-optical-phonon coupling in ZnO/Mg<sub>0.27</sub>Zn<sub>0.73</sub>O quantum wells",,"Physical Review B",,"Vol. 66","No. 23","  233305-1-3",2002,Dec.
"T. Makino,K. Tamura,C. H. Chia,Y. Segawa,M. Kawasaki,A. Ohtomo,H. Koinuma","Effect of MgZnO-layer capping on optical properties of ZnO epitaxial layers",,"Applied Physics Letters",,"Vol. 81","No. 12","pp. 2172-2174",2002,Sept.
"T. Makino,K. Tamura,C. H. Chia,Y. Segawa,M. Kawasaki,A. Ohtomo,H. Koinuma","Radiative recombination of electron-hole pairs spatially separated due to quantum-confined Stark and Franz-Keldish effects in ZnO/Mg<sub>0.27</sub>Zn<sub>0.73</sub>O quantum wells",,"Applied Physics Letters",,"Vol. 81","No. 13","pp. 2355-2357",2002,Sept.
"H. D. Sun,Y. Segawa,M. Kawasaki,A. Ohtomo,K. Tamura,H. Koinuma","Phonon replicas in ZnO/ZnMgO multiquantum wells",,"Journal of Applied Physics",,"Vol. 91","No. 10","pp. 6457-6460",2002,May
"T. Makino,C. H. Chia,Y. Segawa,M. Kawasaki,A. Ohtomo,K. Tamura,Y. Matsumoto,H. Koinuma","High-throughput optical characterization for the development of a ZnO-based ultraviolet semiconductor-laser",,"Applied Surface Science",,"Vol. 189","No. 3-4","pp. 277-283",2002,Apr.
"T. Makino,K. Tamura,C. H. Chia,Y. Segawa,M. Kawasaki,A. Ohtomo,H. Koinuma","Optical properties of ZnO : Al epilayers: Observation of room-temperature many-body absorption-edge singularity",,"Physical Review B",,"Vol. 65","No. 12","  121201(R)-1-4",2002,Mar.
"H. D. Sun,T. Makino,Y. Segawa,M. Kawasaki,A. Ohtomo,K. Tamura,H. Koinuma","Enhancement of exciton binding energies in ZnO/ZnMgO multiquantum wells",,"Journal of Applied Physics",,"Vol. 91","No. 4","pp. 1993-1997",2002,Feb.
"C.H. Chia,T. Makino,Y. Segawa,M. Kawasaki,A. Ohtomo,K. Tamura,H. Koinuma","Well-width dependence of radiative and nonradiative lifetimes in ZnO-based multiple quantum wells",,"Physica Status Solidi B-Basic Research",,"Vol. 229","No. 2","pp. 863-866",2002,Jan.
"T. Makino,K. Tamura,C. H. Chia,Y. Segawa,M. Kawasaki,A. Ohtomo,H. koinuma","Optical properties of ZnO : Al epilayers and of undoped epilayers capped by wider-gap MgZnO grown by laser MBE",,"Physica Status Solidi B-Basic Research",,"Vol. 229","No. 2","pp. 853-857",2002,Jan.
"H. D. Sun,Y. Segawa,T. Makino,C. H. Chia,M. Kawasaki,A. Ohtomo,K. Tamura,H. Koinuma","Observation of biexciton emission in ZnO/ZnMgO multi-quantum wells",,"Physica Status Solidi B-Basic Research",,"Vol. 229","No. 2","pp. 867-870",2002,Jan.
"T. Makino,N. T. Tuan,C. H. Chia,Y. Segawa,M. Kawasaki,A. Ohtomo,K. Tamura,H. Koinuma","Exciton localization in (Cd,Zn)O epilayers and (Cd,Zn)O/(Mg,Zn)O multi-quantum wells on lattice matched substrates",,"International Journal of Modern Physics B","World Scientific Publishing","Vol. 15","No. 28-30","pp. 3853-3856",2001,Dec.
"C. H. Chia,T. Makino,Y. Segawa,M. Kawasaki,A. Ohtomo,K. Tamura,H. Koinuma","Well-width dependence of radiative and nonradiative recombination times in ZnO/Mg<sub>0.12</sub>Zn<sub>0.88</sub>O multiple quantum wells",,"Journal of Applied Physics",,"Vol. 90","No. 7","pp. 3650-3652",2001,Oct.
"T. Makino,T. Yasuda,Y. Segawa,A. Ohtomo,K. Tamura,M. Kawasaki,H. Koinuma","Strain effects on exciton resonance energies of ZnO epitaxial layers",,"Applied Physics Letters",,"Vol. 79","No. 9","pp. 1282-1284",2001,Aug.
"H. D. Sun,T. Makino,Y. Segawa,M. Kawasaki,A. Ohtomo,K. Tamura,H. Koinuma","Biexciton emission from ZnO/Zn<sub>0.74</sub>Mg<sub>0.26</sub>O multiquantum wells",,"Applied Physics Letters",,"Vol. 78","No. 22","pp. 3385-3387",2001,May
"T. Makino,N. T. Tuan,H. D. Sun,C. H. Chia,Y. Segawa,M. Kawasaki,A. Ohtomo,K. Tamura,T. Suemoto,H. Akiyama,M. Baba,S. Saito,T. Tomita,H. Koinuma","Temperature dependence of near ultraviolet photoluminescence in ZnO/(Mg, Zn)O multiple quantum wells",,"Applied Physics Letters",,"Vol. 78","No. 14","pp. 1979-1981",2001,Apr.
"H. D. Sun,T. Makino,N. T. Tuan,Y. Segawa,M. Kawasaki,A. Ohtomo,K. Tamura,H. Koinuma","Temperature dependence of excitonic absorption spectra in ZnO/Zn<sub>0.88</sub>Mg<sub>0.12</sub>O multiquantum wells grown on lattice-matched substrates",,"Applied Physics Letters",,"Vol. 78","No. 17","pp. 2464-2466",2001,Apr.
"T. Makino,Y. Segawa,M. Kawasaki,A. Ohtomo,R. Shiroki,K. Tamura,T. Yasuda,H. Koinuma","Band gap engineering based on Mg<sub>x</sub>Zn<sub>1-x</sub>O and Cd<sub>y</sub>Zn<sub>1-y</sub>O ternary alloy films",,"Applied Physics Letters",,"Vol. 78","No. 9","pp. 1237-1239",2001,Feb.
"H. D. Sun,T. Makino,N. T. Tuan,Y. Segawa,Z. K. Tang,G. K. L. Wong,M. Kawasaki,A. Ohtomo,K. Tamura,H. Koinuma","Stimulated emission induced by exciton-exciton scattering in ZnO/ZnMgO multiquantum wells up to room temperature",,"Applied Physics Letters",,"Vol. 77","No. 26","pp. 4250-4252",2000,Dec.
"A. Ohtomo,K. Tamura,M. Kawasaki,T. Makino,Y. Segawa,Z. K. Tang,G. K. L. Wong,Y. Matsumoto,H. Koinuma","Room-temperature stimulated emission of excitons in ZnO/(Mg, Zn)O superlattices",,"Applied Physics Letters",,"Vol. 77","No. 14","pp. 2204-2206",2000,Oct.
"T. Makino,C. H. Chia,N. T. Tuan,Y. Segawa,M. Kawasaki,A. Ohtomo,K. Tamura,H. Koinuma","Radiative and nonradiative recombination processes in lattice-matched (Cd,Zn)O/(Mg,Zn)O multiquantum wells",,"Applied Physics Letters",,"Vol. 77","No. 11","pp. 1632-1634",2000,Sept.
"T. Makino,C. H. Chia,N. T. Tuan,H. D. Sun,Y. Segawa,M. Kawasaki,A. Ohtomo,K. Tamura,H. Koinuma","Room-temperature luminescence of excitons in ZnO/(Mg, Zn)O multiple quantum wells on lattice-matched substrates",,"Applied Physics Letters",,"Vol. 77","No. 7","pp. 975-977",2000,Aug.
"T. Makino,G. Isoya,Y. Segawa,C. H. Chia,T. Yasuda,M. Kawasaki,A. Ohtomo,K. Tamura,H. Koinuma","Optical spectra in ZnO thin films on lattice-matched substrates grown with laser-MBE method",,"Journal of Crystal Growth",,"Vol. 214",,"pp. 289-293",2000,June
"K. Tamura,A. Ohtomo,K. Saikusa,Y. Osaka,T. Makino,Y. Segawa,M. Sumiya,S. Fuke,H. Koinuma,M. Kawasaki","Epitaxial growth of ZnO films on lattice-matched ScAlMgO<sub>4</sub>(0001) substrates",,"Journal of Crystal Growth",,"Vol. 214",,"pp. 59-62",2000,June
"T. Makino,C. H. Chia,N. T. Tuan,Y. Segawa,M. Kawasaki,A. Ohtomo,K. Tamura,H. Koinuma","Exciton spectra of ZnO epitaxial layers on lattice-matched substrates grown with laser-molecular-beam epitaxy",,"Applied Physics Letters",,"Vol. 76","No. 24","pp. 3549-3551",2000,June
"田村 謙太郎,大友 明,川崎 雅司","酸化亜鉛紫外レーザー",,"マテリアルインテグレーション",,"Vol. 12","No. 9","p. 9-14",1999,Dec.
"A. Ohtomo,K. Tamura,K. Saikusa,K. Takahashi,T. Makino,Y. Segawa,H. Koinuma,M. Kawasaki","Single crystalline ZnO films grown on lattice-matched ScAlMgO<sub>4</sub>(0001) substrates",,"Applied Physics Letters",,"Vol. 75","No. 17","pp. 2635-2637",1999,Oct.