Periodic Modulation of Superlattice by Atomic Layer Epitaxy and Its Application to synthesis of Novel Functional Materials
原子层外延超晶格周期性调制及其在新型功能材料合成中的应用
基本信息
- 批准号:08455154
- 负责人:
- 金额:$ 4.86万
- 依托单位:
- 依托单位国家:日本
- 项目类别:Grant-in-Aid for Scientific Research (B)
- 财政年份:1996
- 资助国家:日本
- 起止时间:1996 至 1997
- 项目状态:已结题
- 来源:
- 关键词:
项目摘要
Electronic states in usual periodic structures are given by the periodicity like Bloch theorem. Introducing non-periodicity into the lattice, the electronic states with singular coherency of electron wavefunctions can be expected. We have focused on the periodic modulation (Fractal etc.) of lattice, and carried on the fablication and the characterization of periodic-modulated superlattices, as novel functional materials. The results of this study are summarized as follows.(1)Development of atomic-layer manipulation technologies for superlattice : (GaAs)m(GaP)n and (AIP)m(GaP)n atomic-layer superlattices have been successfully realized by atomic layer epitaxy(ALE), and also the inter-diffusion between the mono-layer lattice has been discussed.(2)Periodic modulation of superlattice with atomic-layer accuracy : GaAs/GaP and AlP/GaP periodic-modulated superlattices have been successfully realized with atomic-layer accuracy by the ALE technologies. Periodic, quasi-periodic (Fractal), random … More , and multi-periodic structures have been used as the modulated structures, and especially Fibonacci progression has been used as Fractal structures.(3)X-ray analysis of the periodic-modulated superlattices : The XRD pattern of quasi-periodic superlattice shows no periodicity but self-similar geometry, and is consistent with the FFT spectrum of a Fractal structure. Also the X-ray reflection measurement of multi-periodic superlattice shows that the reflection wavelength can be controlled with sub-monolayer accuracy by modulation of the periodicity. This suggests the possibility of application to X-ray mirrors.(4)Optical characterization of electronic states in the periodic-modulated superlattices : Photo-reflectance spectrum of quasi-periodic, random superlattices show peculiar splitting of the subband (electronic states) in comparison with that of the periodic lattice, and are consistent with a transfer matrix calculation for the lattices. This result suggests that the control of electronic state can be possible artificially due to the periodic modulation using the ALE technologies.(5)Application to X-ray mirrors : We have discussed the application of periodic modulation for the lattice to X-ray mirror. Introducing the multiple period into atomic layer superlattice, the reflection wavelength can be controlled arbitrary with sub-monolayer accuracy that is needed to X-ray mirrors. Less
通常周期结构中的电子态由类似Bloch定理的周期性给出。在晶格中引入非周期性,可以得到具有奇异相干波函数的电子态。我们重点讨论了周期调制(分形等)。并进行了超晶格的制备和表征。本研究的结果总结如下。(1)超晶格原子层操控技术的发展:利用原子层外延(ALE)技术成功实现了(GaAs)m(GaP)n和(AIP)m(GaP)n原子层超晶格,并讨论了单层晶格间的互扩散。(2)原子层精度的超晶格周期调制:利用ALE技术成功实现了原子层精度的GaAs/GaP和AlP/GaP周期调制超晶格。周期性、准周期性(分形)、随机 ...更多信息 多周期结构已被用作调制结构,特别是Fibonacci级数已被用作分形结构。(3)X射线衍射分析:准周期超晶格的X射线衍射图显示出非周期性的自相似结构,与分形结构的FFT谱相一致。多周期超晶格的X射线反射测量表明,可以通过调制周期来控制反射波长,达到亚单层精度。这表明了应用于X射线镜的可能性。(4)光调制超晶格中电子态的光学表征:与周期晶格相比,准周期随机超晶格的光反射谱显示出子带(电子态)的特殊分裂,并且与晶格的转移矩阵计算相一致。这一结果表明,由于使用ALE技术的周期性调制,可以人为地控制电子状态。(5)在X射线反射镜中的应用:讨论了晶格周期调制在X射线反射镜中的应用。在原子层超晶格中引入多周期,可以实现X射线反射镜所需的亚单层精度的反射波长任意控制。少
项目成果
期刊论文数量(31)
专著数量(0)
科研奖励数量(0)
会议论文数量(0)
专利数量(0)
H.Isshiki et al.: "Quantum wire structures incorporating (GaAs)m(GaP)n short-period superlattice fabricated by atomic layer epitaxy" Applied Surface Science. 112. 122-126 (1997)
H.Isshiki 等人:“采用原子层外延制造的 (GaAs)m(GaP)n 短周期超晶格的量子线结构”应用表面科学。
- DOI:
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- 影响因子:0
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- 通讯作者:
J.S.Lee et al.: "Selective growth on multi-step array on (lll) A vicinal surface by atomic layer epitaxy" Applied Surface Science. (in press). (1997)
J.S.Lee 等人:“通过原子层外延在 (III) A 邻近表面上进行多步阵列选择性生长”应用表面科学。
- DOI:
- 发表时间:
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- 影响因子:0
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T.Meguro et al.: "Control of ALE window of GaAs employing active hydrogen" Applied Surface Science. 112. 118-121 (1997)
T.Meguro 等人:“利用活性氢控制 GaAs 的 ALE 窗口”应用表面科学。
- DOI:
- 发表时间:
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- 影响因子:0
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- 通讯作者:
M.Ishii et al.: "Reflection-wavelength control method for layer-by-layer controlled multilayer mirrors" Applied Optics. 36. 2152-2156 (1997)
M.Ishii 等人:“逐层控制多层镜的反射波长控制方法”应用光学。
- DOI:
- 发表时间:
- 期刊:
- 影响因子:0
- 作者:
- 通讯作者:
M.Ishii et al.: "Observation and control of surface morphology of AlP grown by atomic layer epitaxy" Applied Physics Letters. 71. 1044-1046 (1997)
M.Ishii 等人:“原子层外延生长 AlP 表面形态的观察和控制”应用物理快报。
- DOI:
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IWAI Sohachi其他文献
IWAI Sohachi的其他文献
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{{ truncateString('IWAI Sohachi', 18)}}的其他基金
Fabrication and Characterization of Atomic Layr Controlled Quantum Nano-structures
原子层控制的量子纳米结构的制备和表征
- 批准号:
06452224 - 财政年份:1994
- 资助金额:
$ 4.86万 - 项目类别:
Grant-in-Aid for General Scientific Research (B)
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