
Tunneling Through Triangular Barrier: an Exercise for PCPBT
23 Jul 2008   Contributor(s):: Dragica Vasileska, Gerhard Klimeck
This exercise teaches the users that a very good result can be obtained when the triangular barrier is approximated with 11 segment piecewise constant potential barrier steps.www.eas.asu.edu/~vasileskNSF

Slides: WKB Approximation Applications
09 Jul 2008   Contributor(s):: Dragica Vasileska, Gerhard Klimeck
www.eas.asu.edu/~vasileskNSF

Quantum Mechanics: Tunneling
08 Jul 2008   Contributor(s):: Dragica Vasileska, Gerhard Klimeck
In quantum mechanics, quantum tunnelling is a micro nanoscopic phenomenon in which a particle violates the principles of classical mechanics by penetrating a potential barrier or impedance higher than the kinetic energy of the particle. A barrier, in terms of quantum tunnelling, may be a form of...

Reading Material: Tunneling
08 Jul 2008   Contributor(s):: Dragica Vasileska
www.eas.asu.edu/~vasileskNSF

Computational Nanoscience, Lecture 26: Life Beyond DFT  Computational Methods for Electron Correlations, Excitations, and Tunneling Transport
16 May 2008   Contributor(s):: Jeffrey B. Neaton
In this lecture, we provide a brief introduction to "beyond DFT" methods for studying excited state properties, optical properties, and transport properties. We discuss how the GW approximation to the selfenergy corrects the quasiparticle excitations energies predicted by KohnSham DFT. For...

Quantum and Semiclassical Electrostatics Simulation of SOI Trigates
19 Feb 2008   Contributor(s):: HyungSeok Hahm, Andres Godoy
Generate quantum/semiclassical electrostatic simulation results for a simple Trigate structure

What Promises do Nanotubes and Nanowires Hold for Future Nanoelectronics Applications?
18 Feb 2008   Contributor(s):: Joerg Appenzeller
Various lowdimensional materials are currently explored for future electronics applications. The common ground for all these structures is that the surface related impact can no longer be ignored – the common approach applied to predict properties of bulktype threedimensional (3D) materials....

Finite Height Quantum Well: an Exercise for Band Structure
31 Jan 2008   Contributor(s):: David K. Ferry
Use the Resonant Tunneling Diodes simulation tool on nanoHUB to explore the effects of finite height quantum wells.Looking at a 2 barrier device, 300 K, no bias, other standard variables, and 3 nm thick barriers and a 7 nm quantum well, determine the energies of the two lowest quasibound states.

Application of the Keldysh Formalism to Quantum Device Modeling and Analysis
14 Jan 2008   Contributor(s):: Roger Lake
The effect of inelastic scattering on quantum electron transport through layered semiconductor structures is studied numerically using the approach based on the nonequilibrium Green's function formalism of Keldysh, Kadanoff, and Baym. The Markov assumption is not made, and the energy...

ElectronPhonon and ElectronElectron Interactions in Quantum Transport
14 Jan 2008   Contributor(s):: Gerhard Klimeck
The objective of this work is to shed light on electron transport through submicron semiconductor structures, where electronic state quantization, electronelectron interactions and electronphonon interactions are important. We concentrate here on the most developed vertical quantum device,...

Quantum Ballistic Transport in Semiconductor Heterostructures
27 Aug 2007   Contributor(s):: Michael McLennan
The development of epitaxial growth techniques has sparked a growing interest in an entirely quantum mechanical description of carrier transport. Fabrication methods, such as molecular beam epitaxy (MBE), allow for growth of ultrathin layers of differing material compositions. Structures can be...

Periodic Potential
21 Feb 2007   Contributor(s):: Heng Li, Alexander Gavrilenko
Calculation of the allowed and forbidden states in a periodic potential

The Bardeen Transfer Hamiltonian Approach to Tunneling and its Application to STM/Carbon Nanotubes
05 May 2004   Contributor(s):: Peter M. Albrecht, Kyle Adam Ritter, Laura B. Ruppalt
This presentation covers the Bardeen Transfer Hamiltonian approach to tunneling and its application to STM/carbon nanotubes.