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In this work we discuss 3D selfconsistent solution of Poisson and Schrodinger equations for electrostatically formed quantum dot. 3D simulations give detailed insight into the energy spectrum of the device and allow us to find values of respective voltages ensuring given number of electrons in the dot. We performed calculations for fully 3D potential and apart from that calculations for the same potential separated into two independent parts, i.e. re-garding to the plane of 2DEG and to the direction perpendicular to the meant plane. We found that calculations done for the two independent parts of the potential give good information about quantum dat properties and they are much faster compared to fully 3D simulations.
Rocznik
Tom
Strony
245--249
Opis fizyczny
Bibliogr. 9 poz., rys.
Twórcy
autor
autor
autor
- Rzeszów University of Technology, 2 W. Pola St., 35-959 Rzeszów, Poland, mmaczka@prz.rzeszow.pl
Bibliografia
- [1] A. Kumar, S.E. Laux, and F. Steru, "Electron states in a GaAs Quantum dot in a magnetic field", Physical Review B 42, 5166-5175 (1990).
- [2] M.A. Kastner, "The single-electron transistor", Reviews of Modem Physics 64 (3), 849 (1992).
- [3] U. Meirav, M. Heiblum, and F. Steru, "High-mobility variable-density two-dimentional elektron gas in inverted GaAs-AlGaAs heterojunctions", Appl. Phys. Lett. 52 (15), 1268-1270 (1988).
- [4] M. Mączka, "Modelling of quantum dots", Quaterly of Electronics and Telecommunications 51 (2), 223 (2005), (in Polish).
- [5] E. Machowska-Podsiadło, M. Bugajski, and S. Pawłowski, "Electron states in the electrostatically formed quantum dots", Acta Physica Polonica B 32, 503 (2002).
- [6] E. Machowska-Podsiadło and M. Mączka, "Electron states in one-electron transistor formed in heterostructure", Electronics 2 (3), 48 (2005), (in Polish).
- [7] D. Heitmann and J. Kotthaus, "The spectroscopy of quantum dot arrays", Physics Today 46,56 (1993).
- [8] B. Meurer, D. Heitmann, and K. Ploog, "Work function of a 2-dimensional electron gas in fiat-band heterojunctions: the role of image charges", Physical Review Letters 68 (9), 1371 (1992).
- [9] D. Feny and S. Goodnick, Transport in Nanostructures, Cambridge University Press, Cambridge, 1997.
Typ dokumentu
Bibliografia
Identyfikator YADDA
bwmeta1.element.baztech-article-BPG5-0025-0042