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In physics, a phonon is a quasiparticle characterized by the quantization of the modes of lattice vibrations of periodic, elastic crystal structures of solids. The study of phonons is an important part of solid state physics because phonons play a major role in many of the physical properties of solids, including a material's thermal and electrical conductivities.

Learn more about quantum dots from the many resources on this site, listed below. More information on Phonons can be found here.

Online Presentations (21-27 of 27)

  1. Tutorial 3a: Materials Simulation by First-Principles Density Functional Theory I

    Online Presentations | 14 Sep 2010 | Contributor(s):: Umesh V. Waghmare

    This lecture provides an introduction to first-principles density functional theory based methods for simulation of materials, with a focus on determination of interatomic force constants and vibrational spectra of nano-structures and extended periodic materials.Outline:Phonons, soft...

  2. Ripples and Warping of Graphene: A Theoretical Study

    Online Presentations | 08 Jun 2010 | 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 with a low energy branch of phonons that exhibits quadratic dispersion at long wave-lengths. Many...

  3. ECE 656 Lecture 25: Phonon Scattering III

    Online Presentations | 13 Nov 2009 | Contributor(s):: Mark Lundstrom

    Outline:ReviewPOP and IV scatteringScattering in common semiconductorsElectron-electron scatteringSummary

  4. ECE 656 Lecture 24: Phonon Scattering II

    Online Presentations | 13 Nov 2009 | Contributor(s):: Mark Lundstrom

    Outline:Review Energy-momentum conservationMathematical formulationExampleSummary

  5. ECE 656 Lecture 23: Phonon Scattering I

    Online Presentations | 10 Nov 2009 | Contributor(s):: Mark Lundstrom

    Outline:About phononsElectron-phonon couplingEnergy-momentum conservationSummary

  6. Illinois ECE 598EP Lecture 8 - Hot Chips: Thermal Conductivity of Solids

    Online Presentations | 24 Jun 2009 | Contributor(s):: Eric Pop, Omar N Sobh

    Thermal Conductivity of SolidsTopics: Kinetic Theory of Energy Transport Simple Kinetic Theory Assumptions Phonon MFP and Scattering Time Silicon Film Thermal Conductivity Silicon Nanowire Thermal Conductivity Isotope Scattering Electron Thermal Conductivity Thermal Conductivity of Cu and Al

  7. Is dual gate device structure better from a thermal perspective?

    5.0 out of 5 stars 

    Online Presentations | 01 Sep 2008 | Contributor(s):: Dragica Vasileska, Stephen M. Goodnick

    This presentation illustrates several points. First, it is shown that in nanoscale devices there is less degradation due to heating effects due to non-stationary nature of the carrier transport (velocity overshoot) in the device, which, in turn, makes less probable the interaction with phonons....