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Debye model information


Peter Debye

In thermodynamics and solid-state physics, the Debye model is a method developed by Peter Debye in 1912 to estimate phonon contribution to the specific heat (heat capacity) in a solid.[1] It treats the vibrations of the atomic lattice (heat) as phonons in a box in contrast to the Einstein photoelectron model, which treats the solid as many individual, non-interacting quantum harmonic oscillators. The Debye model correctly predicts the low-temperature dependence of the heat capacity of solids, which is proportional to [clarification needed] – the Debye T 3 law. Similarly to the Einstein photoelectron model, it recovers the Dulong–Petit law at high temperatures. Due to simplifying assumptions, its accuracy suffers at intermediate temperatures[clarification needed].

  1. ^ Debye, Peter (1912). "Zur Theorie der spezifischen Waerme". Annalen der Physik (in German). 39 (4): 789–839. Bibcode:1912AnP...344..789D. doi:10.1002/andp.19123441404.

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Debye model

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In thermodynamics and solid-state physics, the Debye model is a method developed by Peter Debye in 1912 to estimate phonon contribution to the specific...

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Peter Debye, who came across this function (with n = 3) in 1912 when he analytically computed the heat capacity of what is now called the Debye model. The...

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theory of solids were given by the following: The Einstein solid model and the Debye model, suggesting that the quantum behaviour of exchanging energy in...

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Einstein solid

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same frequency. The independence assumption is relaxed in the Debye model. While the model provides qualitative agreement with experimental data, especially...

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of thermodynamics. One of the strengths of the Debye model is that (unlike the preceding Einstein model) it predicts the proper mathematical form of the...

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Absolute zero

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temperatures, so transitions to more stable states do not occur. Using the Debye model, the specific heat and entropy of a pure crystal are proportional to...

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Molar heat capacity

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contained in these high-frequency modes, a simple modification of the Debye model is sufficient to yield a good approximation to experimental heat capacities...

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Ising model

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The Ising model (or Lenz–Ising model), named after the physicists Ernst Ising and Wilhelm Lenz, is a mathematical model of ferromagnetism in statistical...

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Permittivity

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adequate method of capturing experimental behaviors. The Debye model and the Lorentz model use a first-order and second-order (respectively) lumped system...

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List of things named after Peter Debye

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Debye–Scherrer method Debye–Sears method Debye–Waller factor Debye force Debye frequency, see also Debye model Debye function, see also Debye model Debye...

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Continuum

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any mathematical model that combines space and time into a single continuum Continuum theory of specific heats of solids, see Debye model Triune continuum...

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Dielectric

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polar liquids, as developed by Peter Debye and corrected by Lars Onsager to incorporate reaction field effects. The model can be combined with quantum chemical...

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Old quantum theory

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1907 brought him to the attention of Walther Nernst. Einstein, followed by Debye, applied quantum principles to the motion of atoms, explaining the specific...

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RWTH Aachen University

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Nobel laureate Peter Debye received a degree in electrical engineering from RWTH Aachen and is known for the Debye model and Debye relaxation. Another...

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Thermodynamic databases for pure substances

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entropy can in fact be accurately estimated. At low temperatures, the Debye model leads to the result that the atomic heat capacity Cv for solids should...

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Heat transfer physics

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is the temperature derivatives of phonon energy for the Debye model (linear dispersion model), is c v , p = d E p d T | v = 9 k B m ( T T D ) 3 n ∫ 0...

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