Highest energy continuum of energy levels in a solid that is fully occupied by electrons at \(0\ \text{K}\).
  1. The @[email protected] band is lower in energy than the @[email protected] and is generally completely full in semiconductors. When heated, electrons from the @[email protected] band jump out of the band across the band gap and into the @[email protected], making the material conductive. The @[email protected] separates the @[email protected] band from the @[email protected]
  2. In metals the @[email protected] band is the @[email protected]
  3. Sample characterized by a (unique) sample axis Z with all directions perpendicular to Z being equivalent. In other words, the sample properties are invariant to rotation around Z. Uniaxiality exists in many anisotropic samples and simplifies the interpretation of their spectra considerably.
PAC, 2007, 79, 293. (Glossary of terms used in photochemistry, 3rd edition (IUPAC Recommendations 2006)) on page 438 [Terms] [Paper]