論文

• 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_xZn_1-xO/ZnO single heterostructure ultraviolet light-emitting diodes on ZnO substrates, Applied Physics Letters, American Institute of Physics, Vol. 97, No. 1, 013501-1-3, July 2010.  公式リンク  
  
• 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_xZn_1-xO (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, July 2010.  公式リンク  
  
• 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_xZn_1-xO/ZnO heterostructures, Physical Review B, Vol. 78, No. 23, 233308-1-4, Dec. 2008.  公式リンク  
  
• 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, Sept. 2008.  公式リンク  
  
• 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, Aug. 2008.  公式リンク  
  
• A. Tsukazaki, H. Yuji, S. Akasaka, K. Tamura, K. Nakahara, T. Tanabe, H. Takasu, A. Ohtomo, M. Kawasaki. High electron mobility exceeding 10⁴ cm²V^-1s^-1 in Mg_xZn_1-xO/ZnO single heterostructures grown by molecular beam epitaxy, Applied Physics Express, Vol. 1, No. 5, 055004-1-3, May 2008.  公式リンク  
  
• A. Ohtomo, S. Takagi, K. Tamura, T. Makino, Y. Segawa, H. Koinuma, M. Kawasaki. Photo-irresponsive thin-film transistor with Mg_xZn_1-xO channel, Japanese Journal of Applied Physics Part 2-Letters & Express Letters, Vol. 45, No. 24-28, pp. L694-L696, July 2006.  公式リンク  
  
• 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, May 2003.  公式リンク  
  
• 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, May 2003.  公式リンク  
  
• 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, Apr. 2003.  公式リンク  
  
• 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 ScAlMgO₄ substrates, Journal of Applied Physics, Vol. 92, No. 12, pp. 7157-7159, Dec. 2002.  公式リンク  
  
• 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_0.27Zn_0.73O quantum wells, Physical Review B, Vol. 66, No. 23, 233305-1-3, Dec. 2002.  公式リンク  
  
• 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, Sept. 2002.  公式リンク  
  
• 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_0.27Zn_0.73O quantum wells, Applied Physics Letters, Vol. 81, No. 13, pp. 2355-2357, Sept. 2002.  公式リンク  
  
• 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, May 2002.  公式リンク  
  
• 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, Apr. 2002.  公式リンク  
  
• 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, Mar. 2002.  公式リンク  
  
• 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, Feb. 2002.  公式リンク  
  
• 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, Jan. 2002.  公式リンク  
  
• 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, Jan. 2002.  公式リンク  
  
• 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, Jan. 2002.  公式リンク  
  
• 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, Dec. 2001.  公式リンク  
  
• 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_0.12Zn_0.88O multiple quantum wells, Journal of Applied Physics, Vol. 90, No. 7, pp. 3650-3652, Oct. 2001.  公式リンク  
  
• 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, Aug. 2001.  公式リンク  
  
• H. D. Sun, T. Makino, Y. Segawa, M. Kawasaki, A. Ohtomo, K. Tamura, H. Koinuma. Biexciton emission from ZnO/Zn_0.74Mg_0.26O multiquantum wells, Applied Physics Letters, Vol. 78, No. 22, pp. 3385-3387, May 2001.  公式リンク  
  
• 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, Apr. 2001.  公式リンク  
  
• 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_0.88Mg_0.12O multiquantum wells grown on lattice-matched substrates, Applied Physics Letters, Vol. 78, No. 17, pp. 2464-2466, Apr. 2001.  公式リンク  
  
• T. Makino, Y. Segawa, M. Kawasaki, A. Ohtomo, R. Shiroki, K. Tamura, T. Yasuda, H. Koinuma. Band gap engineering based on Mg_xZn_1-xO and Cd_yZn_1-yO ternary alloy films, Applied Physics Letters, Vol. 78, No. 9, pp. 1237-1239, Feb. 2001.  公式リンク  
  
• 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, Dec. 2000.  公式リンク  
  
• 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, Oct. 2000.  公式リンク  
  
• 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, Sept. 2000.  公式リンク  
  
• 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, Aug. 2000.  公式リンク  
  
• 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, June 2000.  公式リンク  
  
• 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 ScAlMgO₄(0001) substrates, Journal of Crystal Growth, Vol. 214, pp. 59-62, June 2000.  公式リンク  
  
• 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, June 2000.  公式リンク  
  
• A. Ohtomo, K. Tamura, K. Saikusa, K. Takahashi, T. Makino, Y. Segawa, H. Koinuma, M. Kawasaki. Single crystalline ZnO films grown on lattice-matched ScAlMgO₄(0001) substrates, Applied Physics Letters, Vol. 75, No. 17, pp. 2635-2637, Oct. 1999.  公式リンク  
  

国際会議発表 (査読有り)

• 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_xZn_1-xO 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, Feb. 2008.

国内会議発表 (査読なし・不明)

• 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", Feb. 2008.

その他の論文・著書など

• 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, Dec. 1999.

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