## Solid state physics |

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Page 184

Thus, a force in a positive k direction causes a deacceleration (

acceleration). The electron behaves as though it had a

"push" on it, it slows down instead of speeding up. And the harder we push, the

faster is ...

Thus, a force in a positive k direction causes a deacceleration (

**negative**acceleration). The electron behaves as though it had a

**negative**mass. When we"push" on it, it slows down instead of speeding up. And the harder we push, the

faster is ...

Page 185

8-9), we can see that an electron in the first energy band has positive effective

mass for values of k between 0 and about 0.5 A-1 and has

mass for values of k between 0.5 A-1 and the zone boundary at 1.25 A-1. An

electron ...

8-9), we can see that an electron in the first energy band has positive effective

mass for values of k between 0 and about 0.5 A-1 and has

**negative**effectivemass for values of k between 0.5 A-1 and the zone boundary at 1.25 A-1. An

electron ...

Page 188

be Here, we write the effective mass of the electron as m*n (n for "

distinguish it from the effective mass m* of the hole (p for "positive"). P Problem 9-

9. Show that the acceleration of a hole in a one- dimensional metal is given by Eq

.

be Here, we write the effective mass of the electron as m*n (n for "

**negative**") todistinguish it from the effective mass m* of the hole (p for "positive"). P Problem 9-

9. Show that the acceleration of a hole in a one- dimensional metal is given by Eq

.

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### Contents

XRay Diffraction | 37 |

Lattice Vibrations | 61 |

Classical Model of Metals | 89 |

Copyright | |

12 other sections not shown

### Common terms and phrases

Answer Appendix basis vectors bcc lattice bond Bragg angle Bragg's Law Bravais lattice Brillouin zone called Chapter collisions conduction electrons Consider conventional unit cell Cooper pairs depletion layer diode direction dispersion curve displacement distance doped effective mass elec electric current electric field electrons and holes emitter energy band equal example Fermi energy Fermi level Fermi surface force forward biased free electron free particle frequency given by Eq inside integers ions k-space laser lattice parameter lattice points lattice vector lattice wave magnetic field n-type semiconductor NaCl negative neutrons number of electrons obtain occupied one-dimensional oscillate p-n junction photon positively charged potential energy primitive unit cell Problem rays reciprocal lattice reverse biased sc lattice scattered Schroedinger's equation shown in Fig sodium metal solid structure superconductor temperature tion transistor trons unit cell unoccupied values velocity voltage wave function wave number wave vector wavelength Wigner-Seitz cell wire x-ray diffraction zero