## Proceedings of the International School of Physics "Enrico Fermi.", Volume 37N. Zanichelli, 1967 - Nuclear physics |

### From inside the book

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Page 40

There is a difference between effective

theory and the effective

contribution to the effective

the ...

There is a difference between effective

**masses**calculated in the one electrontheory and the effective

**masses**... In magnetic metals there is an analogouscontribution to the effective

**mass**from electron magnon scattering ; in this casethe ...

Page 41

EPO The electron - magnon

than the electron - phonon

of states is in the band . This value of ß can be used in conjuction with ( 4 .

EPO The electron - magnon

**mass**enhancement for the neck is much greaterthan the electron - phonon

**mass**enhancement because at E , most of the densityof states is in the band . This value of ß can be used in conjuction with ( 4 .

Page 200

... must be admitted , however , that since in the present problem self - energy

effects are much more intricate than the simple

theories , our conclusions might be valid only in the vicinity of the Fermi energy .

with Yx ...

... must be admitted , however , that since in the present problem self - energy

effects are much more intricate than the simple

**mass**shifts in relativistic fieldtheories , our conclusions might be valid only in the vicinity of the Fermi energy .

with Yx ...

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### Contents

LOMER Band theory and magnetism | 1 |

JACCARINO Studies of the hyperfine interaction in transi | 39 |

P W ANDERSON and W L MCMILLAN Multiplescattering | 50 |

Copyright | |

25 other sections not shown

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### Common terms and phrases

alloys amplitude analytic Anderson approximation assume average band becomes Born bound calculation complex computed condition conduction consider contribution correct correlation corresponding coupling curve defined density depends determined discussed effect electrons energy equation exchange expected expression fact factor Fermi Fermi level ferromagnetic field function given gives Hamiltonian host metal impurity atom included integral interaction interesting lattice limit localized magnetic matrix element means metals method moments momentum normal obtained occur operator orbital particle perturbation Phys physical plane polarization poles positive possible potential present problem properties range relation replaced represent resonance scattering screening Sect seems shift shown similar simple solution spin structure surface temperature theory tion transition metals usual wave wave functions write written zero