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Spatial distribution of elastic deformations in Ge/Si structures with quantum dots
Journal of Experimental and Theoretical Physics, 2000A method is developed for calculating the elastic deformation in coherently strained heterostructures on the basis of the valence force field (VFF) model using the Green’s function of the “atomistic” elastic problem. The spatial distribution of the elastic deformations in a Ge/Si system with pyramidal Ge quantum dots buried in a Si matrix is ...
A. V. Nenashev, A. V. Dvurechenskii
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Single- and Few-Electron States in Deformed Topological Insulator Quantum Dots
Chinese Physics Letters, 2015We theoretically investigate the single- and few-electron states in deformed HgTe quantum dots (QDs) with an inverted band structure using the full configuration interaction method. For the circular and deformed QD, it is found that the energy of edge states is robust against the shape from the circular QD in various elliptic ones. For the few electron
Jian Li, Dong Zhang
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Deformed molecular states of quantum dots in strong magnetic fields
Physica B: Condensed Matter, 2001The effect of a shearing electric field on molecular states of electrons in quantum dots in strong magnetic fields is investigated theoretically. The electron density in circularly symmetric dots is circularly symmetric but the pair correlation function has peaks whose positions have the same symmetry as the classical energy minimum.
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Characterization of deformed quantum dots by modeling single-electron-tunneling experiments
Physica E: Low-dimensional Systems and Nanostructures, 2005We have analyzed a single-electron transport spectrum of a quantum dot formed in a GaAs/AlGaAs resonant tunneling device. The measured spectrum indicates a strong confining potential and the lack of circular symmetry. We model the quantum dot by applying a rounded parabolic potential and a negatively charged impurity, shifted laterally and vertically ...
E. Räsänen +4 more
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Journal of Nanophotonics, 2014
The deformed potential structure of CdSe/ZnS core/shell quantum dots (QDs) was analyzed by calculating precise state energies and state functions. Exactly how an external electric field affects the photoluminescence was also studied. Additionally, the tilt potential structure induced by the external electric field, commonly referred to as the quantum ...
Yu-Jen Chen +2 more
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The deformed potential structure of CdSe/ZnS core/shell quantum dots (QDs) was analyzed by calculating precise state energies and state functions. Exactly how an external electric field affects the photoluminescence was also studied. Additionally, the tilt potential structure induced by the external electric field, commonly referred to as the quantum ...
Yu-Jen Chen +2 more
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Reconstruction of electronic filling spectra caused by the deformation in few-electron quantum dots
Chemical Physics Letters, 2003Abstract We present a simple and feasible method based on ab initio principle for studying the partly deformed quantum dot with a three-dimensional confinement potential of finite depth, which relies on the unrestricted Hartree–Fock–Roothaan equation.
Zhenhong Dai +3 more
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Deformation potentials and photo-response of strained PbSe quantum wells and quantum dots
Physica E: Low-dimensional Systems and Nanostructures, 2006Abstract Deformation potentials ( D u and D d ) for PbSe where analyzed using transmission data of PbSe/PbEuSeTe multi-quantum wells (MQWs). We use calculations based on a k · p model to obtain the strain induced intervalley splitting in the quantum wells.
M. Simma +5 more
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Electronic states in circular and ellipsoidally deformed quantum dots
2001Tarucha, S. +6 more
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