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| links [2019/06/06 10:27] – janettate | links [2020/03/06 09:12] (current) – external edit 127.0.0.1 |
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| * Here is a [[http://lampx.tugraz.at/~hadley/ss1/phonons/1d/1d2m.php|visualization of the two-atom unit cell phonon dispersion]] relation. You can vary the k vector and the mass ratio. You see the optical and acoustic modes visualized beneath. Note that m2/m1 =1 makes the BZ modes degenerate as it should. | * Here is a [[http://lampx.tugraz.at/~hadley/ss1/phonons/1d/1d2m.php|visualization of the two-atom unit cell phonon dispersion]] relation. You can vary the k vector and the mass ratio. You see the optical and acoustic modes visualized beneath. Note that m2/m1 =1 makes the BZ modes degenerate as it should. |
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| * Mathematica has some nice demos (for everything!); here's one for [[http://demonstrations.wolfram.com/PhononDispersionRelationInBrillouinZone/|phonons in a simple 1-d lattice]]and also a [[http://demonstrations.wolfram.com/HeatCapacityOfSolidsInTheDebyeApproximation/|Debye specific heat calculator]] | * Mathematica has some nice demos (for everything!); here's a [[http://demonstrations.wolfram.com/HeatCapacityOfSolidsInTheDebyeApproximation/|Debye specific heat calculator]] |
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