Single-electron charging and Coulomb interaction in InAs self-assembled quantum dot arrays
نویسندگان
چکیده
منابع مشابه
Charging dynamics of InAs self-assembled quantum dots
We present results on the dynamics of the charging of arrays of InAs self-assembled quantum dots ~SAQD’s!. An equivalent circuit used for metal-insulator-semiconductor–field-effect transistor structures is applied and successfully predicts the observed behavior of the capacitance and conductance dependence on the excitation frequency. The Coulomb blockade effect also plays a role in the frequen...
متن کاملDetection of Single Electron Charging in individual InAs Quantum Dot by Nonconctact Atomic Force Microscopy
Quantum dots (QD) of various kinds are one of the most important entities in nanotechnology due to their potential applications as lasers, memory storage devices or building blocks for quantum computation. Understanding the electronic structure of QDs is not only important for such application, but also of great interest in fundamental physics. As a consequence, there have been a number of stud...
متن کاملDetection of single-electron charging in an individual InAs quantum dot by noncontact atomic-force microscopy.
Single-electron charging in an individual InAs quantum dot was observed by electrostatic force measurements with an atomic-force microscope (AFM). The resonant frequency shift and the dissipated energy of an oscillating AFM cantilever were measured as a function of the tip-back electrode voltage, and the resulting spectra show distinct jumps when the tip was positioned above the dot. The observ...
متن کاملShell structure and electron-electron interaction in self-assembled InAs quantum dots
Using far-infrared spectroscopy, we investigate the excitations of selforganized InAs quantum dots as a function of the electron number per dot, 1 ≤ ne ≤ 6, which is monitored in situ by capacitance spectroscopy. Whereas the well-known two-mode spectrum is observed when the lowest (s-) states are filled, we find a rich excitation spectrum for ne ≥ 3, which reflects the importance of electron-el...
متن کاملFröhlich interaction in InAs/GaAs self-assembled quantum dots
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ژورنال
عنوان ژورنال: Physical Review B
سال: 1997
ISSN: 0163-1829,1095-3795
DOI: 10.1103/physrevb.55.1568