Study on Resonant Tunneling via Wannier-Stark States

Wannier-Stark 态共振隧道研究

• 批准号: 10450122
• 负责人: HAMAGUCHI Chihiro
• 金额: $ 5.44万
• 依托单位: Osaka University
• 依托单位国家: 日本
• 项目类别: Grant-in-Aid for Scientific Research (B)
• 财政年份: 1998
• 资助国家: 日本
• 起止时间: 1998 至 1999
• 项目状态: 已结题
• 来源: https://kaken.nii.ac.jp/grant/KAKENHI-PROJECT-10450122/
• 关键词: Wannier-STark state; p-i-n diode; Zener current; resonant tunneling

It has been pointed out that Zener current flowing a p-i-n diode can be modulated due to interaction between the Zener current and Wannier-Stark states, when the p-i-n diode has a superlattice in its intrinsic region. In order to investigate detail of the interaction, we carried out transport and optical measurements as well as energy band calculations. The sample we have used are p-i-n diodes which contains a 15periods of (GaAs)ィイD26ィエD2/(AlAs)ィイD26ィエD2 superlattice in the intrisic region. The derivative of conductance measured at 4.2 K exhibits a series of peaks. The optical measurements (electroreflectance method) have shown that the Wannier-Stark states are formed in the superlattice region. These results clearly indicates that the peaks in the derivative of conductance are due to the resonance between Zener current and Wannier-Stark states.Furthermore, we carried out transport measurements under magnetic field. We have fond out that the peaks show shift due to the magnetic field. More studies are necessary to clarify the origin of the peak shift.

已经指出，当p-i-n二极管在其本征区具有超晶格时，由于齐纳电流和Wannier-Stark态之间的相互作用，流过p-i-n二极管的齐纳电流可以被调制。为了研究相互作用的细节，我们进行了传输和光学测量以及能带计算。所用的样品是p-i-n二极管，在半导体区含有15个周期的（GaAs）_xD_（26）_xD_2/（AlAs）_xD_（26）_xD_2超晶格。在4.2K下测得的电导的导数表现出一系列的峰。光学测量（电反射法）表明，在超晶格区形成了Wannier-Stark态。这些结果清楚地表明，电导导数中的峰值是由于Zener电流和Wannier-Stark态之间的共振引起的。我们发现，由于磁场的作用，这些峰发生了位移。需要更多的研究来澄清峰移的起源。

项目成果

M. Yamanaka, H. Itoh, M. Morifuji, and C. Hamaguchi: "Thermal Dissociation of Excitons in a Type-I Superlatticies Studied by Time-Resolved Photoluminescence Measurements"Physica E. (2000)

M. Yamanaka、H. Itoh、M. Morifuji 和 C. Hamaguchi：“通过时间分辨光致发光测量研究 I 型超晶格中激子的热解离”Physica E. (2000)

M. Morifuji 他: "Incoherent Bloch Oscillation and Delocalization of Stark-ladders"Solid State Electronics. 42. 1505-1508 (1998)

M. Morifuji 等人：“斯塔克梯的非相干布洛赫振荡和离域”固态电子学，42。1505-1508 (1998)

M. Morifuji 他: "Complemental Theory for Vertical Transport"Physics and Computer Modeling. 62-66 (1998)

M. Morifuji 等人：“垂直传输的补充理论”物理和计算机建模 62-66 (1998)。

M.Morifuji, C.Hamaguchi: "Stark-ladders in an Imperfect Crystal"Physical Review B. 58. 12842-12847 (1998)

M.Morifuji, C.Hamaguchi：“不完美晶体中的斯塔克梯子”物理评论 B. 58. 12842-12847 (1998)

M. Morifuji 他: "Complemental Theory for Vertical Transport"Sixth Int. Workshop on Computational Electronics. 13-16 (1998)

M. Morifuji 等人：“垂直传输的互补理论”第六届计算电子学国际研讨会 (1998)。