If the transfer integral of these particles is small, the repulsion between them can lead to the Mott transition. If these particles are “nearly free” but weakly interact with a periodic potential, Bloch’s theorem (10[1])can be used to compute their band structure. Superconductivity (10[1])is caused by bound pairs of these particles (10[1])theorized (10[1])by Leon Cooper. (10[1])Places in a lattice (10[1])where these particles (10[1])don’t exist are called holes. (10[3])If a photon’s energy exceeds a material’s work function, it can eject one of these particles (10[1])in an effect whose (10[1])description won Albert Einstein the Nobel Prize. For 10 points, name these negatively-charged particles whose orbitals surround the nuclei of atoms. ■END■