hokhani said:By this you mean that an electron with wave vector at brillouin zone edge has standing wave function and hence has no role in conduction?
Forbidden electron energies, also known as band gaps, are energy levels within a solid material that are not occupied by electrons. These energy levels act as barriers, preventing the electrons from moving freely through the solid.
Forbidden electron energies are determined by the arrangement of atoms in a solid material. The energy levels are created by the interactions between the atoms and their surrounding electrons, resulting in energy bands that are either occupied or unoccupied by electrons.
The presence of forbidden electron energies in a material can affect its electrical and optical properties. Materials with larger band gaps are typically insulators, while those with smaller or no band gaps are typically conductors.
Yes, forbidden electron energies can be manipulated through various methods such as doping, applying external electric fields, or altering the material's composition. These techniques can change the band gap and thus, the electrical conductivity of the material.
According to band theory, electrons in a solid material exist in energy bands that are separated by forbidden energy levels. This theory explains how the arrangement of atoms and their interactions with electrons determine the material's electrical and optical properties, including the presence of forbidden electron energies.