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Description

In solid-state physics, the electronic band structure of a solid describes ranges of energy that an electron is "forbidden" or "allowed" to have. It is a function of the diffraction of the quantum mechanical electron waves in the periodic crystal lattice with a specific crystal system and Bravais lattice. The band structure of a material determines several characteristics, in particular its electronic and optical properties. More information on Band structure can be found here.

Online Presentations (1-20 of 50) feed

  1. ECE 656 Lecture 3: Density of States

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    07 Sep 2011 | Online Presentations | Contributor(s): Mark Lundstrom

    Outline: Density of states Example: graphene Discussion Summary

    http://nanohub.org/resources/11932

  2. ECE 656 Lecture 2: Sums in k-Space/Integrals in Energy Space

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    07 Sep 2011 | Online Presentations | Contributor(s): Mark Lundstrom

    Outline: Density of states in k-space Example Working in energy space Discussion Summary

    http://nanohub.org/resources/11931

  3. Tutorial 4a: High Bias Quantum Transport in Resonant Tunneling Diodes

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    29 Mar 2011 | Online Presentations | Contributor(s): Gerhard Klimeck

    Outline: Resonant Tunneling Diodes - NEMO1D: Motivation / History / Key Insights Open 1D Systems: Transmission through Double Barrier Structures - Resonant Tunneling Introduction to RTDs: Linear …

    http://nanohub.org/resources/11043

  4. Tutorial 4b: Introduction to the NEMO3D Tool - Electronic Structure and Transport in 3D

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    29 Mar 2011 | Online Presentations | Contributor(s): Gerhard Klimeck

    Electronic Structure and Transport in 3D - Quantum Dots, Nanowires and Ultra-Thin Body Transistors

    http://nanohub.org/resources/11049

  5. Tutorial 4c: Formation of Bandstructure in Finite Superlattices (Exercise Session)

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    29 Mar 2011 | Online Presentations | Contributor(s): Gerhard Klimeck

    How does bandstructure occur? How large does a repeated system have to be? How does a finite superlattice compare to an infinite superlattice?

    http://nanohub.org/resources/11051

  6. Tutorial 4d: Formation of Bandstructure in Finite Superlattices (Exercise Demo)

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    29 Mar 2011 | Online Presentations | Contributor(s): Gerhard Klimeck

    Demonstration of the Piece-Wise Constant Potential Barriers Tool.

    http://nanohub.org/resources/11052

  7. Nanoelectronic Modeling Lecture 41: Full-Band and Atomistic Simulation of Realistic 40nm InAs HEMT

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    05 Aug 2010 | Online Presentations | Contributor(s): Gerhard Klimeck, Neerav Kharche, Neophytos Neophytou, Mathieu Luisier

    This presentation demonstrates the OMEN capabilities to perform a multi-scale simulation of advanced InAs-based high mobility transistors. Learning Objectives: Quantum Transport Simulator …

    http://nanohub.org/resources/9285

  8. Nanoelectronic Modeling Lecture 35: Alloy Disorder in Nanowires

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    05 Aug 2010 | Online Presentations | Contributor(s): Gerhard Klimeck, Timothy Boykin, Neerav Kharche, Mathieu Luisier, Neophytos Neophytou

    This presentation discusses the consequences of Alloy Disorder in unstrained strained AlGaAs nanowires Relationship between dispersion relationship and transmission in perfectly ordered wires …

    http://nanohub.org/resources/9280

  9. Nanoelectronic Modeling Lecture 34: Alloy Disorder in Quantum Dots

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    05 Aug 2010 | Online Presentations | Contributor(s): Gerhard Klimeck, Timothy Boykin, Chris Bowen

    This presentation discusses the consequences of Alloy Disorder in strained InGaAs Quantum Dots Reminder of the origin of bandstructure and bandstructure engineering What happens when there is …

    http://nanohub.org/resources/9279

  10. Nanoelectronic Modeling Lecture 33: Alloy Disorder in Bulk

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    04 Aug 2010 | Online Presentations | Contributor(s): Gerhard Klimeck, Timothy Boykin, Chris Bowen

    This presentation discusses disorder in AlGaAs unstrained systems in bulk. Bandstructure of an ideal simple unit cell What happens when there is disorder? Concept of a supercell …

    http://nanohub.org/resources/9278

  11. Thermoelectric Nanotechnology

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    27 Jul 2010 | Online Presentations | Contributor(s): Mark Lundstrom

    his talk is an undergraduate level introduction to the field. After a brief discussion of applications, the physics of the Peltier effect is described, and the Figure of Merit (FOM), ZT, which …

    http://nanohub.org/resources/9421

  12. Nanoelectronic Modeling Lecture 25a: NEMO1D - Full Bandstructure Effects

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    07 Jul 2010 | Online Presentations | Contributor(s): Gerhard Klimeck

    (quantitative RTD modeling at room temperature)

    http://nanohub.org/resources/8594

  13. Ripples and Warping of Graphene: A Theoretical Study

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    08 Jun 2010 | Online Presentations | Contributor(s): Umesh V. Waghmare

    We use first-principles density functional theory based analysis to understand formation of ripples in graphene and related 2-D materials. For an infinite graphene, we show that ripples are linked …

    http://nanohub.org/resources/9010

  14. Nanoelectronic Modeling Lecture 25b: NEMO1D - Hole Bandstructure in Quantum Wells and Hole Transport in RTDs

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    09 Mar 2010 | Online Presentations | Contributor(s): Gerhard Klimeck

    Heterostructures such as resonant tunneling diodes, quantum well photodetectors and lasers, and cascade lasers break the symmetry of the crystalline lattice. Such break in lattice symmetry causes a …

    http://nanohub.org/resources/8595

  15. Nanoelectronic Modeling Lecture 26: NEMO1D -

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    09 Mar 2010 | Online Presentations | Contributor(s): Gerhard Klimeck

    NEMO1D demonstrated the first industrial strength implementation of NEGF into a simulator that quantitatively simulated resonant tunneling diodes. The development of efficient algorithms that …

    http://nanohub.org/resources/8596

  16. Nanoelectronic Modeling: Exercises 1-3 - Barrier Structures, RTDs, and Quantum Dots

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    27 Jan 2010 | Online Presentations | Contributor(s): Gerhard Klimeck

    Exercises: Barrier Structures Uses: Piece-Wise Constant Potential Barrier Tool Resonant Tunneling Diodes Uses: Resonant Tunneling Diode Simulation with NEGF • Hartree calculation • …

    http://nanohub.org/resources/8259

  17. Nanoelectronic Modeling Lecture 14: Open 1D Systems - Formation of Bandstructure

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    27 Jan 2010 | Online Presentations | Contributor(s): Gerhard Klimeck, Dragica Vasileska

    The infinite periodic structure Kroenig Penney model is often used to introduce students to the concept of bandstructure formation. It is analytically solvable for linear potentials and shows …

    http://nanohub.org/resources/8197

  18. Nanoelectronic Modeling Lecture 12: Open 1D Systems - Transmission through Double Barrier Structures - Resonant Tunneling

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    27 Jan 2010 | Online Presentations | Contributor(s): Gerhard Klimeck, Dragica Vasileska

    This presentation shows that double barrier structures can show unity transmission for energies BELOW the barrier height, resulting in resonant tunneling. The resonance can be associated with a …

    http://nanohub.org/resources/8195

  19. Nanoelectronic Modeling Lecture 08: Introduction to Bandstructure Engineering II

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    25 Jan 2010 | Online Presentations | Contributor(s): Gerhard Klimeck

    This presentation provides a brief overview of the concepts of bandstructure engineering and its potential applications to light detectors, light emitters, and electron transport devices. Critical …

    http://nanohub.org/resources/8094

  20. Nanoelectronic Modeling Lecture 07: Introduction to Bandstructure Engineering I

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    25 Jan 2010 | Online Presentations | Contributor(s): Gerhard Klimeck

    This presentation serves as a reminder about basic quantum mechanical principles without any real math. The presentation reviews critical properties of classical systems that can be described as …

    http://nanohub.org/resources/8093

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