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Tags: ABACUS

Description

ABACUS is a collection of tools for the teaching fundamental concepts of semiconductor devices. These concepts typically include lattices, crystal structure, bandstructure, band models, carrier distributions, drift, diffusion, pn junctions, solar cells, light-emitting diodes (LED), bipolar junction transistors (BJT), metal-oxide semiconductor capacitors (MOScap), and multi-acronym-device field effect transistors (madFETs).

ABACUS is the key element in the Tool-Powered Curriculum on Semiconductor Device Education.

Resources (41-60 of 88)

  1. Homework: WKB Approximation

    09 Jul 2008 | Teaching Materials | Contributor(s): Dragica Vasileska, Gerhard Klimeck

    www.eas.asu.edu/~vasileskNSF

    http://nanohub.org/resources/4990

  2. Energy Bands as a Function of the Geometry of the n-Well Potential: an Exercise

    05 Jul 2008 | Teaching Materials | Contributor(s): Dragica Vasileska, Gerhard Klimeck

    Explores the position and the width of the bands as a function of the 10-barrier potential parameters. NSF

    http://nanohub.org/resources/4873

  3. Can we define unique effective masses in Si nanowires?

    06 Jul 2008 | Teaching Materials | Contributor(s): Dragica Vasileska, Gerhard Klimeck

    This exercise teaches the users that for small nanostructures the concept of the effective mass becomes vague and in order to properly describe nanostructures one has to take into account the...

    http://nanohub.org/resources/4880

  4. Tutorial on Semi-empirical Band Structure Methods

    06 Jul 2008 | Teaching Materials | Contributor(s): Dragica Vasileska

    This tutorial explains in details the Empirical Pseudopotential Method for the electronic structure calculation, the tight-binding method and the k.p method. For more details on the Empirical...

    http://nanohub.org/resources/4882

  5. Exercise: Density of States Function Calculation

    06 Jul 2008 | Teaching Materials | Contributor(s): Dragica Vasileska, Gerhard Klimeck

    These exercises teach the students how to derive the DOS function for a 2D and a 1D system and to calculate the energy-dependent effective mass for non-parabolic bands.www.eas.asu.edu/~vasileskNSF

    http://nanohub.org/resources/4890

  6. Exercise: Dopants and Semiconductor Statistics

    06 Jul 2008 | Teaching Materials | Contributor(s): Dragica Vasileska, Gerhard Klimeck

    This exercise emphasizes the calculation of the position of the Fermi level at T=0K and it also teaches the students about Einstain relation for non-degenerate...

    http://nanohub.org/resources/4892

  7. PN Diode Exercise: Series Resistance

    06 Jul 2008 | Teaching Materials | Contributor(s): Dragica Vasileska, Gerhard Klimeck

    An exercise in determining the series resistance in a PN diode.

    http://nanohub.org/resources/4894

  8. Exercise: PIN Diode

    06 Jul 2008 | Teaching Materials | Contributor(s): Dragica Vasileska, Gerhard Klimeck

    An exercise in the operation of a PIN diode under the conditions of forward and reverse bias.

    http://nanohub.org/resources/4896

  9. PN Diode Exercise: Graded Junction

    06 Jul 2008 | Teaching Materials | Contributor(s): Dragica Vasileska, Gerhard Klimeck

    An exercise in determining the preferred approach to solving the Poisson equation.

    http://nanohub.org/resources/4898

  10. Schred: Exercise 1

    06 Jul 2008 | Teaching Materials | Contributor(s): Dragica Vasileska, Gerhard Klimeck

    This exercise illustrates basic SCHRED capabilities for modeling MOS capacitors and also illustrates how the bound states distribution in energy changes with doping. The average distance of the...

    http://nanohub.org/resources/4900

  11. SCHRED: Exercise 2

    06 Jul 2008 | Teaching Materials | Contributor(s): Dragica Vasileska, Gerhard Klimeck

    In this exercise students examine the doping dependence of the threshold voltage shift in MOS capacitors due to the quantum-mechanical charge description in the channel.www.eas.asu.edu/~vasileskNSF

    http://nanohub.org/resources/4902

  12. Schred: Exercise 3

    06 Jul 2008 | Teaching Materials | Contributor(s): Dragica Vasileska, Gerhard Klimeck

    This exercise examines the degradation of the total gate capacitance with technology generation due to Maxwell-Boltzmann instead of Fermi-Dirac statistics, quantum-mechanical charge description...

    http://nanohub.org/resources/4904

  13. MOSFET Exercise

    07 Jul 2008 | Teaching Materials | Contributor(s): Dragica Vasileska, Gerhard Klimeck

    With this exercise students are familiarized with the punchthrough effect, the series resistance at the source and drain region and the importance of impact ionization at high gate and drain bias...

    http://nanohub.org/resources/4906

  14. Periodic Potentials and the Kronig-Penney Model

    01 Jul 2008 | Teaching Materials | Contributor(s): Dragica Vasileska

    This material describes the derivation of the Kronig-Penney model for delta-function periodic potentials.

    http://nanohub.org/resources/4847

  15. Quantum-Mechanical Reflections in Nanodevices: an Exercise

    02 Jul 2008 | Teaching Materials | Contributor(s): Dragica Vasileska, Gerhard Klimeck

    This exercise points out to the fact that quantum-mechanical reflections are going to be significant in nanoscale devices and proper modeling of these device structures must take into...

    http://nanohub.org/resources/4849

  16. Periodic Potentials and Bandstructure: an Exercise

    02 Jul 2008 | Teaching Materials | Contributor(s): Dragica Vasileska, Gerhard Klimeck

    This exercise teaches the students that in the case of strong coupling between the neighboring wells in square and Coulomb periodic potential wells electrons start to behave as free electrons and...

    http://nanohub.org/resources/4851

  17. From 1 well to 2 wells to 5 wells to periodic potentials: an Exercise

    02 Jul 2008 | Teaching Materials | Contributor(s): Dragica Vasileska, Gerhard Klimeck

    This exercise demonstrates that the interaction between the wells lifts the degeneracy of the quasi-bound states and if in the limit we have infinite periodic potential it leads to formation of...

    http://nanohub.org/resources/4853

  18. Exercise: CV curves for MOS capacitors

    02 Jul 2008 | Teaching Materials | Contributor(s): Dragica Vasileska, Gerhard Klimeck

    This exercise demonstrates to the students how the low-frequency CV curves in MOS capacitors change with changing the gate workfunction, the oxide thickness and the dielectric constant. It also...

    http://nanohub.org/resources/4855

  19. Quantum-Mechanical Reflections: an Exercise

    30 Jun 2008 | Teaching Materials | Contributor(s): Dragica Vasileska, Gerhard Klimeck

    http://nanohub.org/resources/4831

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