In general, these materials are characterized by a very high bandgap, o⢄en over four electron volts.
P. W. Anderson showed that, when the disorder potential is too strong, interference of a wavefunction with itself results in this type of material. Because of correlation effects, an example of these materials occurs when the on-site repulsion is much greater than the inter-site hopping, which are the two terms in the Hubbard model. In the simplest possible MOSFET ("MOSS"-fet), this type of material underlies the gate terminal. In general, these materials are characterized by a very high bandgap, o⢄en over four electron volts. If these materials can be polarized by an electric field, as are often found in capacitors, they are called dielectrics. For 10 points, name these materials with tightly bound electrons in which current does not flow, as contrasted with conductors.
P. W. Anderson showed that, when the disorder potential is too strong, interference of a wavefunction with itself results in this type of material.
electrical insulators [prompt on "dielectrics" before "dielectrics"]