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Curs 3 Proprietati geometrice ale retei reciproce • Vectorul retelei ...

Curs 3 Proprietati geometrice ale retei reciproce • Vectorul retelei ...

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Ca si in RD, celula primitiva este unitatea simetrica a RR. Valorile<br />

distincte <strong>ale</strong> vectorilor sunt numai cele cuprinse in interiorul celulei<br />

primitive, de la 0 pana la , respectiv de la 0 la . Astfel, pe<br />

directiile fundament<strong>ale</strong> <strong>ale</strong> <strong>retelei</strong> <strong>reciproce</strong> cubice, valorile distincte <strong>ale</strong><br />

vectorului vor fi .<br />

In spatiul reciproc (spatiul Fourier, spatiul vectorilor de unda), volumul<br />

cel mai mic, care contine toate valorile distincte <strong>ale</strong> vectorilor , se<br />

numeste prima zona Brillouin (IBZ).

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