Electron tunneling dynamics between two-dimensional and zero-dimensional quantum systems: Contributions of momentum matching, higher subbands, and phonon-assisted processes

A. R. Korsch; C. Ebler; G. N. Nguyen; S. Scholz; A. D. Wieck; A. Ludwig

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Electron tunneling dynamics between two-dimensional and zero-dimensional quantum systems: Contributions of momentum matching, higher subbands, and phonon-assisted processes

机译：二维和零尺寸量子系统之间的电子隧道动力学：动量匹配，更高的子带和声子辅助过程的贡献

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We investigate tunneling dynamics of electrons from an ensemble of self-assembled InAs quantum dots into the subbands of a two-dimensional electron gas (2DEG). LO-phonon-assisted tunneling processes and tunneling into higher subbands of the 2DEG electronic structure cause distinct resonances in the evolution of the tunneling rate as a function of the energy detuning between quantum dot and 2DEG ground state. By devising a semiquantitative model, we identify the momentum mismatch between the quantum dot and 2DEG wave function as the crucial quantity governing the evolution of the tunneling rate. In particular, we demonstrate that this mechanism along with the availability of tunneling into the second 2DEG subband allows for tuning of the tunneling rate by more than two orders of magnitude.

机译：我们从自组装的INA量子点的集合中调查电子的隧道动力学进入二维电子气体（2deg）的子带。 LO-Phonon辅助隧道过程和隧道进入2DEG电子结构的更高子带引起隧道速率的演化中的不同共振，作为量子点和2DEG接地状态之间的能量静脉的函数。通过设计半定量模型，我们将量子点和2DEG波函数之间的动量失配作为控制隧道速率的演变的关键量。特别地，我们证明该机制以及隧道的可用性以及进入第二2DEG子带的可用性允许通过两个以上的级别调谐隧道速率。

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《Physical review》 |2020年第3期|035413.1-035413.7|共7页
作者
A. R. Korsch; C. Ebler; G. N. Nguyen; S. Scholz; A. D. Wieck; A. Ludwig;
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Lehrstuhl fuer Angewandte Festkoerperphysik Ruhr-Universitaet Bochum Universitaetsstrasse 150 D-44780 Bochum Germany;

Lehrstuhl fuer Angewandte Festkoerperphysik Ruhr-Universitaet Bochum Universitaetsstrasse 150 D-44780 Bochum Germany;

Lehrstuhl fuer Angewandte Festkoerperphysik Ruhr-Universitaet Bochum Universitaetsstrasse 150 D-44780 Bochum Germany;

Lehrstuhl fuer Angewandte Festkoerperphysik Ruhr-Universitaet Bochum Universitaetsstrasse 150 D-44780 Bochum Germany;

Lehrstuhl fuer Angewandte Festkoerperphysik Ruhr-Universitaet Bochum Universitaetsstrasse 150 D-44780 Bochum Germany;

Lehrstuhl fuer Angewandte Festkoerperphysik Ruhr-Universitaet Bochum Universitaetsstrasse 150 D-44780 Bochum Germany;

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1. Electron tunneling dynamics between two-dimensional and zero-dimensional quantum systems: Contributions of momentum matching, higher subbands, and phonon-assisted processes [J] . Korsch A. R., Ebler C., Nguyen G. N., Physical review, B . 2020,第3期

机译：二维和零尺寸量子系统之间的电子隧道动力学：动量匹配，更高的子带和声子辅助过程的贡献
2. Spin dynamics of electrons in the first excited subband of a high-mobility low-density two-dimensional electron system [J] . Haihui Luo, Xuan Qian, Xuezhong Ruan, Physical review . 2009,第19期

机译：高迁移率低密度二维电子系统第一受激子带中电子的自旋动力学
3. Formation of nanoelectrostatic quantum dots and two-dimensional subbands by the random potential of Mn donors in p-i-n resonant tunneling heterosystems [J] . Kovalskii V.A., Vdovin E.E., Khanin Y.N. JETP Letters . 2010,第5期

机译：p-i-n共振隧穿系统中Mn供体的随机势形成纳米静电量子点和二维子带
4. Phonon-assisted subband depopulation in semiconductor quantum well laser heterostructures [C] . Kisin M.V., Stroscio M.A., Belenky G., Data Engineering, 2005. ICDE 2005. . 2005

机译：半导体量子阱激光异质结构中的声子辅助子带减少
5. Phonon-assisted charge carrier dynamics and photoexcited state phenomena in nanoscale systems: Semiconductor quantum dots and carbon nanotubes. [D] . Kilina, Svetlana V. 2007

机译：纳米系统中的声子辅助电荷载流子动力学和光激发态现象：半导体量子点和碳纳米管。
6. A Two-Dimensional Electron Gas as a Sensitive Detector for Time-Resolved Tunneling Measurements on Self-Assembled Quantum Dots [O] . Martin Geller, Bastian Marquardt, Axel Lorke, 2010

机译：二维电子气作为自组装量子点上时间分辨隧穿测量的灵敏检测器
7. Phonon-assisted tunnelling of electrons in a quantum well-quantum dot injection structure [O] . Mielnik-Pyszczorski, Adam, Gawarecki, Krzysztof, Machnikowski, Paweł 2014

机译：声子辅助隧道中的电子在量子阱 - 量子点中注射结构
8. Quantum Theory of Magnetotransport in Two-Dimensional Systems with Electron-Impurity, Electron-Phonon and Electron-Electron Interactions [R] . Grabowski, M., Madhukar, A. 1982

机译：具有电子杂质，电子 - 声子和电子 - 电子相互作用的二维系统中磁传输的量子理论

Electron tunneling dynamics between two-dimensional and zero-dimensional quantum systems: Contributions of momentum matching, higher subbands, and phonon-assisted processes

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