Table of Contents: 00:09 Lecture 2.5: Lattice Thermal Conductivity 00:20 review: coupled charge and heat currents 00:48 heat flux and thermal conductivity 01:04 Lecture 5 topics 01:26 electron dispersion 02:27 mass and spring 03:45 phonon dispersion 04:34 real dispersions 05:24 general model for lattice thermal conduction 07:04 near-equilibrium heat flux 08:03 window functions 09:26 heat conduction 10:19 electrical conduction 10:51 window functions: electrons vs. phonons 11:39 diffusive heat transport (3D) 12:25 diffusive heat transport (3D) 13:12 diffusive heat transport (3D) 13:33 connection to traditional view 14:31 effective mass model for electrons 14:59 Debye model for acoustic phonons 15:43 limitation of Debye model 16:58 effective mass model for electrons 17:33 lattice thermal conductivity 17:46 scattering 18:37 phonon-phonon scattering 19:07 N and U processes 20:26 scattering summary 21:07 temperature-dependent thermal conductivity 22:13 electron vs. phonon conductivities 22:56 electron vs. phonon conductivities 25:05 n-type Bi2Te3 vs. Si 26:29 Phonon MFP engineering 27:30 summary This video is part of the nanoHUB-U course "Thermoelectricity: From Atoms to Systems." The second week is taught by Mark Lundstrom. (http://nanohub.org/courses/teas) This five-week short course introduces students to the thermoelectric theory and applications using a unique, "bottom up" approach to carrier transport that has emerged from research on molecular and nanoscale electronics. The first two weeks of the course introduce this new perspective and connects it to the traditional treatment of thermoelectric science. Landauer formalism provides a unified framework to study both electron and phonon transport. The following three weeks introduce latest nanoscale and macroscale characterization techniques, the design of thermoelectric systems, and recent advances in nanoengineered thermoelectric materials and physics.

• published: 18 Jun 2014
• views: 111