Electrons in Molecular Solids
As is well known, there are various types of molecules in the world. However, it is also well known that when molecules are condensed macroscopically, they can make even more numerous varieties of crystals with periodic lattice structures. In this case, the electrons associated with each molecule can move all over the crystall and result in various new macroscopic characteristics. In some cases, these new characteristies can be directly attributed to the nature of a single constituent molecule. However, we often encounter entirely new characteristics that can scarcely be imagined from the original properties of each isolated molecule, and these are attributed to the macroscopic condensation itself. In this section, we will be mainly concerned with theories explaining these new characteristics exhibited by electrons in various molecular crystals.
KeywordsHigh Occupied Molecular Orbital Lower Unoccupied Molecular Orbital Charge Density Wave Frenkel Exciton Molecular Solid
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