Anderson model

The Anderson model, developed by physicist P.W. Anderson, describes how impurities in a material can affect its electronic properties. Imagine a perfect crystal as a well-organized library. When a few books (impurities) are randomly placed in this library, they disrupt the organization, making it challenging to find other books (electrons). This disruption can lead to localization, where electrons become trapped around these impurities and cannot move freely. This concept is crucial in understanding various phenomena in condensed matter physics, particularly in insulators and certain types of materials where electron movement is hindered by disorder.