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

### From inside the book

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Page 27

Whether the oneelectron levels

of quasi - particle energies ( in a many - body sense ) is a question to which

theory has no answer at present . There is , however , experimental evidence [ 15

] to ...

Whether the oneelectron levels

**represent**a good approximation to the real partsof quasi - particle energies ( in a many - body sense ) is a question to which

theory has no answer at present . There is , however , experimental evidence [ 15

] to ...

Page 68

Again there the scheme is to choose a best « core » function to

large effects of the potential ; another way of thinking of that scheme is as an

approximation that 8 , - NA is small and slowly varying . The use of a suitable set

of Vka ...

Again there the scheme is to choose a best « core » function to

**represent**thelarge effects of the potential ; another way of thinking of that scheme is as an

approximation that 8 , - NA is small and slowly varying . The use of a suitable set

of Vka ...

Page 249

The magnetic solutions

degenerate . This means that in this particular case the localized impurity

moment does not couple with the ferromagnetic matrix in this approximation .

When the ...

The magnetic solutions

**represent**the impurity moment and their energies aredegenerate . This means that in this particular case the localized impurity

moment does not couple with the ferromagnetic matrix in this approximation .

When the ...

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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