echnic
发表于 2025-3-25 03:47:36
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Classify
发表于 2025-3-25 07:38:05
Allgemeine Methoden und Ergebnisse der wellenmechanischen Vielelektronentheorie in Kristallgittern,understood in this way as well as the limitations in the applicability of the approximations used. Some applications of the results to the theory of ferromagnetism and of ionic crystals are discussed. For further progress it seems necessary to develop a theory which takes into account the . correlation of the electrons in a more satisfactory way.
lattice
发表于 2025-3-25 13:45:17
,Die chemische Bindung in halbleitenden Festkörpern,For .- or .-electrons (second lattice type) each eigen-function is oriented towards two or even more directions of space. This leads to resonance phenomena and has the consequence that the breadth of the energy gap decreases. These relations are discussed for the above-named examples as well as for MgTl, Mg.Pb, NiO and PtS..
CHOP
发表于 2025-3-25 16:37:11
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巩固
发表于 2025-3-25 23:09:23
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网络添麻烦
发表于 2025-3-26 03:43:01
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骄傲
发表于 2025-3-26 06:50:46
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adipose-tissue
发表于 2025-3-26 09:29:45
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施加
发表于 2025-3-26 13:08:17
https://doi.org/10.1007/978-1-4419-5686-6o strong. An important example is that of an electron moving in a polar medium. If one tries to explain superconductivity with aid of the interaction between electrons and lattice oscillations, such a strong coupling is also to be taken into account..A survey of a number of recent papers is therefor
先锋派
发表于 2025-3-26 18:26:21
https://doi.org/10.1007/978-3-319-48824-0me interval between two consecutive collisions is not large compared with the duration of the collisions. It is shown, how in many cases of practical interest the results of perturbation theory can be justified.