Introduction to Solid State Physicsproblems after each chapter |
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Page 288
From the form of ( 11.34 ) we are led to suspect that a conduction electron may behave in some respects as if it had an effective mass 1 1 ( 11.35 ) --- [ 1 + 1 ) 2 ( 0 | plakalp : 10 ] m * m - E , – We shall examine the effective mass ...
From the form of ( 11.34 ) we are led to suspect that a conduction electron may behave in some respects as if it had an effective mass 1 1 ( 11.35 ) --- [ 1 + 1 ) 2 ( 0 | plakalp : 10 ] m * m - E , – We shall examine the effective mass ...
Page 289
plays the role of a mass , and we call this quantity the effective mass m * : h ? ( 11.44 ) m * = ( d'E / dk ? ) We note that , if the energy is given by E ( h ” / 2m * ) k ?, then m * here is consistent with ( 11.44 ) .
plays the role of a mass , and we call this quantity the effective mass m * : h ? ( 11.44 ) m * = ( d'E / dk ? ) We note that , if the energy is given by E ( h ” / 2m * ) k ?, then m * here is consistent with ( 11.44 ) .
Page 293
Although k is increased by Ak by the applied electric field , the consequent Bragg reflections result in an overall decrease in the momentum of the electron , so that the effective mass may be described as being negative .
Although k is increased by Ak by the applied electric field , the consequent Bragg reflections result in an overall decrease in the momentum of the electron , so that the effective mass may be described as being negative .
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Contents
DIFFRACTION OF XRAYS BY CRYSTALS | 44 |
CLASSIFICATION OF SOLIDS LATTICE ENERGY | 63 |
ELASTIC CONSTANTS OF CRYSTALS | 85 |
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alloys applied approximately associated atoms axis band boundary calculated cell chapter charge concentration condition conductivity consider constant crystal cubic density dependence determined dielectric diffusion direction discussion dislocation distribution domain effect elastic electric electron elements energy equal equation equilibrium experimental expression factor field force frequency function germanium give given heat capacity hexagonal holes important impurity increase interaction ionic ions lattice levels London magnetic magnetic field mass material measurements metals method motion normal observed obtained parallel particles Phys physics plane polarization positive possible potential present problem properties range reference reflection region relation resistivity result room temperature rotation shown in Fig simple solid solution space space group specimen structure surface symmetry Table temperature theory thermal tion transition unit usually values vector volume wave zero zone