Quantum Point Contact simulations on ISIS structure

• Autorzy: Hałdaś G. , Mączka M.
• Języki publikacji: EN

Abstrakty

EN

In the work a numerical method of dissolving the Poisson equation in an electrostatically formed Quantum Point Contact (QPC) is described. Such a device is based on the structure called ISIS (Inverted Semiconductor Insulator Semiconductor). This structure was proposed in 1991 by Kastner [1] who made single electron transistor in it. In this paper the Poisson equation is solved by means of boundary elements method [2] with functions of the single layer potential [3] whose result provides potential distributions of the QPC device. The electronic properties of the QPC model are found by the use of Green functions method [4]. The interaction between structure and two leads is described by self-energy method [5]. The QPC conductance is calculated with the help of Landauer formula, after the Green’s function corresponding to device Hamiltonian is evaluated.

Słowa kluczowe

EN

quantum point contact; QPC; inverted semiconductor; insulator semiconductor; ISIS; ISIS structure; semiconductors; numerical model

PL

QPC; ISIS; struktura ISIS; półrzewodniki; modelowanie numeryczne

• Wydawca: Institute of Electron Technology
• Czasopismo: Electron Technology : Internet Journal
• Rocznik: 2005/2006
• Tom: Vol.37/38, nr 12
• Strony: 1--6
• Opis fizyczny: Bibliogr. 13 poz., wykr.

Twórcy

autor

Hałdaś G.

• Rzeszów University of Technology, ul. W. Pola 2, 35-959 Rzeszów, Poland

autor

Mączka M.

• Rzeszów University of Technology, ul. W. Pola 2, 35-959 Rzeszów, Poland

Bibliografia

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• 4. E. N. ECONOMOU, Green's Functions in Quantum Physics, Springer, New York, 1983.
• 5. S. DATTA, Electronic Transport in Mesoscopic Systems, Cambridge University Press, 1995.
• 6. J. H. DAVIES, The Physics of Low-Dimensional Semiconductors, Cambridge University Press, 1998.
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• 9. M. J. McLENNAN, Y. LEE, S. DATTA, Voltage Drop in Mesoscopic Systems: A Numerical Study Using a Kinetic Equation, Phys. Rev. B, 1991, 43, 13846.
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• 12. B. J. van WEES, H. van HOUTEN, C. W. J. BEENAKKER, J. G. WILLIAMSON, L. P. KOUWENHOVEN, D. van der MAREL, C. T. FOXON, Quantized Conductance of Point Contacts in a Two-Dimensional Electron Gas, Phys. Rev. Lett., 1988, 60, 848-850.
• 13. J. A. NIXON, J. H. DAVIES, H. U. BARANGER, Breakdown of Quantized Conductance in Point Contacts Calculated Using Realistic Potentials, Phys. Rev. B, 1991, 43, 12638-12641.