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

### From inside the book

Results 1-3 of 53

Page 2

The

/ rii ) Q ; , so that the Bloch theorem can be proved and the wave functions Vi are

always of the form Wi ( r ) = u ( r ) exp [ i kór ] , where ux ( r ) = uk ( r + a ) where a

...

The

**symmetry**of the lattice is fully repeated in the terms 2 V , ( R , - r ; ) and E ' ( e/ rii ) Q ; , so that the Bloch theorem can be proved and the wave functions Vi are

always of the form Wi ( r ) = u ( r ) exp [ i kór ] , where ux ( r ) = uk ( r + a ) where a

...

Page 8

When k is represented by a point of high

electron wave function can be classified according to their

to the operations that leave k unchanged . For example suppose k lies as

sketched ...

When k is represented by a point of high

**symmetry**, the corresponding one -electron wave function can be classified according to their

**symmetry**with respectto the operations that leave k unchanged . For example suppose k lies as

sketched ...

Page 408

It is possible that the ground states of different families cross , but H has no matrix

elements between them because H ( t ) preserves the

which the classification into families is based . We conclude that ( { nk } æo , T ) is

...

It is possible that the ground states of different families cross , but H has no matrix

elements between them because H ( t ) preserves the

**symmetry**properties onwhich the classification into families is based . We conclude that ( { nk } æo , T ) is

...

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### Contents

LOMER Band theory and magnetism | 1 |

PHILLIPS Band theory of transition metals | 22 |

JACCARINO Studies of the hyperfine interaction in transi | 39 |

Copyright | |

19 other sections not shown

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### Common terms and phrases

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