All Categories (61-66 of 66)

1. Finite Height Quantum Well: an Exercise for Band Structure

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   Teaching Materials | 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 quasi-bound states.

2. Application of the Keldysh Formalism to Quantum Device Modeling and Analysis

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   Papers | 14 Jan 2008 | Contributor(s):: Roger Lake

   The effect of inelastic scattering on quantum electron transport through layered semi-conductor structures is studied numerically using the approach based on the non-equilibrium Green's function formalism of Keldysh, Kadanoff, and Baym. The Markov assumption is not made, and the energy coordinate...

3. Electron-Phonon and Electron-Electron Interactions in Quantum Transport

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   Papers | 14 Jan 2008 | Contributor(s):: Gerhard Klimeck

   The objective of this work is to shed light on electron transport through sub-micron semi-conductor structures, where electronic state quantization, electron-electron interactions and electron-phonon interactions are important. We concentrate here on the most developed vertical quantum device,...

4. Quantum Ballistic Transport in Semiconductor Heterostructures

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   Papers | 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 ultra-thin layers of differing material compositions. Structures can be...

5. Periodic Potential

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   Tools | 21 Feb 2007 | Contributor(s):: Heng Li, Alexander Gavrilenko

   Calculation of the allowed and forbidden states in a periodic potential

6. The Bardeen Transfer Hamiltonian Approach to Tunneling and its Application to STM/Carbon Nanotubes

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   Online Presentations | 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.