faddish
发表于 2025-3-23 11:08:44
Chemical Bonding in Solids,erequisite, though, for the success of these models, is that the participating atoms are not simply chosen at random from the periodic table of elements; the solid must be composed of a limited number of different elements whose atoms are arranged in space with a certain order.
颠簸地移动
发表于 2025-3-23 14:00:42
Thermal Properties,on of the crystal, each with a harmonic time dependence and a specific frequency which, in the case of a periodic solid, is given by the dispersiOn relation ?(.). Any one of these “normal modes” can gain or lose energy independently of the others.
gorgeous
发表于 2025-3-23 20:18:34
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Antagonism
发表于 2025-3-24 00:59:10
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Host142
发表于 2025-3-24 05:38:13
Diffraction from Periodic Structures,oscope. Nonetheless, when one wishes to determine an unknown structure, or make exact measurements of structural parameters, it is necessary to rely on diffraction experiments. The greater information content of such measurements lies in the fact that the diffraction process is optimally sensitive t
擦试不掉
发表于 2025-3-24 08:07:10
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制定
发表于 2025-3-24 13:48:51
Thermal Properties,f harmonic forces. With (4.7) we arrived at a system of equations that, for a given wave vector ., couples the wave amplitudes of the atoms within a unit cell. It can be shown mathematically that within the harmonic approximation the equations of motion, even for a nonperiodic solid, can be complete
羽毛长成
发表于 2025-3-24 17:15:08
,“Free” Electrons in Solids,sed on the fact that for the dynamics of the heavy nuclei, or of the nuclei together with their strongly bound core electrons (this combination is known as the “;atomic core”), the energy can be expressed as a function of the nuclear or core coordinates in terms of a time-independent potential: the
crucial
发表于 2025-3-24 19:03:00
The Electronic Bandstructure of Solids,e-electron approximation and of a square-well potential, are oversimplifications. Thus one cannot expect this model to explain, for example, the fundamentally important optical and electronic properties of semiconductors. If one imagines, as discussed briefly in Chap. 1, that a solid is created by a
胆小懦夫
发表于 2025-3-25 03:11:05
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