半導体ナノ構造による光・スピン・電荷複合物性の展開

1999 年度 実績報告書

• 研究課題/領域番号: 11694095
• 研究種目: 基盤研究(B)
• 研究機関: 千葉大学
• 研究代表者: 嶽山 正二郎 千葉大学, 理学部, 教授 (20163446)
• 研究分担者: 足立 智 姫路工業大学, 理学部, 助手 (10221722) ; 中山 隆史 千葉大学, 理学部, 助教授 (70189075)
• キーワード: 希薄磁性半導体量子井戸 / 界面磁化 / 励起子磁気ポーラロン / 高圧強磁場 / 励起子分子 / 縮退四光波混合 / 励起子分岐 / スピン緩和

研究概要

非対称希薄磁性半導体量子井戸での励起子磁気ポーラロンの研究
希薄磁性半導体量子構造での磁気光学効果を説明するのにモデル計算を行い界面磁化の特異性、磁性非磁性局在、非対称励起子磁気ポーラロン局在、励起子分岐の問題について解明した。
希薄磁性量子井戸での高圧磁性光学効果
希薄磁性半導体量子井戸での高圧強磁場磁気発光測定から、半導体荷電子帯正孔と局在磁気イオンとの交換相互作用機構をp-d混在、d-d間距離との関連で明らかにした。また、簡単なモデル計算と磁気光学測定から量子井戸ヘテロ界面磁化の検出法を提案した。ヘテロ界面磁化特異性とそこでの交換相互作用の圧力による増大を示した。p-d混成に起因する交換相互作用と系の次元性(3次元から2次元)との関連も明らかになりつつある。
励起子分子と超高速スピン緩和
化合物半導体や希薄磁性半導体量子井戸での励起子分子状態を見出し、その超高速時間分解分光(縮退四光波混合)により励起子分子生成、緩和過渡家庭を明らかにした。特にスピン3重項励起子分子状態が過渡的に現れ、スピン緩和が励起子分子の動的過程に大きく関与していることを示した。励起子分子の磁場効果にもついても知見を得つつある。
非対称ゼーマン分裂
希薄磁性半導体で見られる非対称なゼーマン分裂について理論的考察を行い、磁性イオン内励起状態と励起子の共鳴状態が起因しているという可能性を示し、これを実証できる測定を提案した。

研究成果

• [文献書誌] 野尻 浩之,嶽山 正二郎: "Submilimeter wave ESR study of Cd_<1-x>Mn_xTe"Proc. of the 9^<th> Inter. Conf. on II-VI Compounds, Kyoto, Th-P025. (1999)
• [文献書誌] 足立 智,嶽山 正二郎: "Biexcitons in CdMnTe/CdTe/CdMgTe single quantum well"Proc. of the 9^<th> Inter. Conf. on II-VI Compounds, Kyoto, Th-16. (1999)
• [文献書誌] 嶽山 正二郎,Jacek Kossut, Tomas Wojtowicz: "Zeeman-gap anomaly in photoluminescence from a two-dimensional electron gas in CdTe/(Cd,Mg)Te quantum wells"Phys. Rev. B. 59. 7327-7329 (1999)
• [文献書誌] Thomas Stirner, Jacek Kossut, Winston E. Hagston, 岳山 正二郎, Tomas Wojtowicz: "Exciton magnetic polarons in asymmetric diluted magnetic semiconductor quantum wells"Phys. Rev. B. 60 No.16. 11545-11549 (1999)
• [文献書誌] 嶽山 正二郎 , 足立 智 Jacek Kossut, Tomas Wojtowicz: "Photo-induced magnetic polarons in low-dimensional dilute magnetic semiconductors"Materials Science and Engineering B. 63. 111-118 (1999)
• [文献書誌] 横井 裕之 , 岳山 正二郎 , Jacek Kossut , Tomas Wojtowicz: "Pressure effect on magneto-optical properties in CdTe/(Cd., Mn)Te single quantum wells high Mn concentration"J. Appl. Phys.. 85. 5935-5938 (1999)
• [文献書誌] 嶽山 正二郎: "Magnetic polarons in diluted magnetic semiconductors"Springer Series in Solid State Science. Magneto-optics ed. by S. Sugano and N. Kojima. Vol.128. 179-209 (1999)
• [文献書誌] 横井 裕之 , 嶽山 正二郎 , Jacek Kossut, Tomas Wojtowicz: "Pressure effect on the exchange interaction in the interface region of a CdTe/CdMnTe quantum well structure"Proc. of the 9^<th> Inter. Conf. on II-VI Compounds, Kyoto, Th-P035. (1999)
• [文献書誌] 中山 隆史: "Tight-binding-calculation Method and Phyisical Origin of Reflectance Difference Spectra of Semicondutctor Surfaces"J. Appl. Phys.. 38. 3497-3503 (1999)
• [文献書誌] 中山 隆史: "Chemical Trend of Reflectance Difference Spectra of Anion-rich Compound Semicounductor Sufaces of Anion-rich Compound Semiconductor Surfaces"Appl. Surf. Sci.. 158(印刷中). (2000)
• [文献書誌] 中山 隆史: "Electronic Structures and Charge Transfer of Au-overlayered Si(111) Surfaces"Appl. Surf. Sci.. 158(印刷中). (2000)
• [文献書誌] 中山 隆史: "Monte Carlo Simulation of ZnSe/GaAs Heterovalent Epitaxy"Jpn. J. Appl. Phys. Suppl.. 39(印刷中). (2000)
• [文献書誌] Jacek Kossut, Tomas Wojtowicz: "Extreme In-Plane Anisotropy of the Heavy-Hole g Factor in (001)-CdTe/CdMnTe Quantum Wells"Phys. Rev. Lett.. 82. 3176 (1999)
• [文献書誌] Jacek Kossut, Tomas Wojtowicz: "High Temperature Magnetic and Optical Properties of CdTe-MnTe Superlattices"Phys. Rev. B. 59. 7679 (1999)
• [文献書誌] Jacek Kossut, Tomas Wojtowicz: "Optical study of spin glass-like transition in epilayers and quantum well structures containing Cd1-xMnxTe"J. Magnetism and Magn. Mater.. 191. 25 (1999)
• [文献書誌] 中山 隆史: "Vacancy Ordering/disordering and Electronic Structures of II1-III2-VI4 Compounds"J. Cryst. Growth. (印刷中). (2000)
• [文献書誌] 中山 隆史: "Electronic Structures of Hexagonal ZnO/GaN Interfaces"J. Cryst. Growth. (印刷中). (2000)
• [文献書誌] 中山 隆史: "Optical Response Spectra Calculation of Wide-gap ZnSe Surfaces"Jpn. J. Appl. Phys. Suppl.. 39(印刷中). (2000)
• [文献書誌] Jacek Kossut, Tomas Wojtowicz: "Detection of nonequilibrium phonos by the exciton Luminescence in CdMnTe-based quantum wells"Physica B. 263-264. 501 (1999)
• [文献書誌] Jacek Kossut, Tomas Wojtowicz: "Photoluminescence and Cyclotron Resonance in CdTe and CdMnTe 2DEG at High Magnetic Fields"Proc.4th Int. Symposium on Advanced Physical Fields: Quantum Phenomena in Advanced Materials at High Magnetic Fields. 111 (1999)
• [文献書誌] Jacek Kossut, Tomas Wojtowicz: "Transport in Heterostructures and Wires of Modulation -Doped Cd1-xMnxTe/Cd1-yMgyTe:I"Proc. 24-th Int. Conf. on Phys. of Semicond., Jerusalem 1998, Ed. Dawid Gershoni, World Scientiffc, Singapore 1999.
• [文献書誌] Jacek Kossut, Tomas Wojtowicz: "Orthorhombic symmetry of valence-band states in CdTe/Cd1-xMnxTe quantum wells"Fizika Tverdogo Tela. 41. 903 (1999)
• [文献書誌] Jacek Kossut, Tomas Wojtowicz: "Optical Properties of CdTe/ZnTe Self-Assembled Quantum Dots versus CdTe/ZnTe Strained Quantum Wells"Proc. 24-th Int. Conf. on Phys. of Semicond., Jerusalem 1998, Ed. Dawid Gershoni, World Scientiffc, Singapore 1999.
• [文献書誌] Jacek Kossut, Tomas Wojtowicz: "Excitons and Negatively Charged Excitons as Intermediate States for Spin-Flip Raman Scattering in Modulation-Doped Quantum Wells"Proc. 24-th Int. Conf. on Phys. of Semicond., Jerusalem 1998, Ed. Dawid Gershoni, World Scientiffc, Singapore 1999.
• [文献書誌] Jacek Kossut, Tomas Wojtowicz: "g-factor dependence of the evolution of magnetooptical spectra with the density of quasi two-dimensional electrons in Cd1-xMnxTe/Cd1-yMgyTe heterostructures"Phys. Rev. B. 59. R10437 (1999)
• [文献書誌] Jacek Kossut, Tomas Wojtowicz: "Photoluminescence Study of CdTe/ZnTe Self-Assembled Quantum Dots"Appl. Phys. Lett.. 74. 3011 (1999)
• [文献書誌] Jacek Kossut, Tomas Wojtowicz: "Iodine - impurity level in MBE - grown Cd1-xMnxTe"Phys. Rev. B. 59. 12917 (1999)
• [文献書誌] Jacek Kossut, Tomas Wojtowicz: "Exchange Between the Conduction Band Electrons and Magnetic lons in Quantum-Confined Structures"Phys. Rev. Lett.. 83. 1431 (1999)
• [文献書誌] Jacek Kossut, Tomas Wojtowicz: "Direct measurement of the lattice parameter of thick stable zinc-blende MgTe layer"J. of All. and Comp.. 286. 276 (1999)
• [文献書誌] Jacek Kossut, Tomas Wojtowicz: "Heating of the spin system by nonequilibrium phonons in semimagnetic (Cd,Mn,Mg)Te quantum wells"Phys. Rev. B. 60. 5609 (1999)
• [文献書誌] Jacek Kossut, Tomas Wojtowicz: "Cyclotron resonance in high moblilty CdTe/CdMgTe 2D electron system in the integer quantum Hall regime"Physica B. 256-258. 457 (1998)
• [文献書誌] Jacek Kossut, Tomas Wojtowicz: "Exciton-electron interactionas in CdTe/CdMgTe modulation-doped quantum wells"Proc. 24-th Int. Conf. on Phys. of Semicond., Jerusalem 1998, Ed. Dawid Gershoni, World Scientiffc, Singapore 1999. (1999)
• [文献書誌] Jacek Kossut, Tomas Wojtowicz: "Excitonic Trions in Cd1-xMnxTe/Cd1-yMgyTe Modulation Doped Quantum Structures"Proc. 24-th Int. Conf. on Phys. of Semicond., Jerusalem 1998, Ed. Dawid Gershoni, World Scientiffc, Singapore 1999. (1999)
• [文献書誌] Jacek Kossut: "Magnetooptical Properties of CdTe Quantum Well Structures with Quaternary CdMnMgTe Barriers"Semiconductor Science and Technology. 14. 979 (1999)
• [文献書誌] Winston E. Hagston, Thomas Stirner: "Faraday rotation and interface enhancement effects in diluted-magnetic-semiconductor superlattices"Phys. Rev. B. 59. 5784-5790 (1999)
• [文献書誌] Thomas Stirner, Winston E. Hagston: "Semimagnetic semi-conductor quantum wells: magnetic polarons and paramagnetic effects"Journal of Physics: Condensed Matter. 12. 701-708 (2000)
• [文献書誌] Yuri Semenov: "Magnetooptical determination of the valence band offset in CdTe/Cd1-xMnxTe heterostructure"Phys. Rev. B. 59. 10276-10282 (1999)
• [文献書誌] Yuri Semenov: "Resonant hole states in a quantum well with semimagnetic barriers"Phys. Rev. B. 60. 10941-10948 (1999)