| 1. | This excites an electron from the valence band into the conduction band.
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| 2. | Helium II has no such valence band but nevertheless conducts heat well.
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| 3. | Kane improved previous valence band models by adding the lowest conduction band.
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| 4. | The spin orbit splitting in the valence band is several hundred meV.
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| 5. | In the valence band the mobile carriers are " holes ".
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| 6. | Hole conduction in a valence band can be explained by the following analogy.
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| 7. | In nominally doped semiconductors, the Fermi level lies between the conduction and valence bands.
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| 8. | The valence band, immediately below the forbidden band, is normally very nearly completely occupied.
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| 9. | They " accept " electrons from the semiconductor's valence band.
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| 10. | The apparent effects are : band gap reduction, valence band splitting, and optical anisotropy.
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