It confirms the unique optical characteristics of the materials in the presence of the quasi particles, as well as the unusual physical properties, which are important for basic science and Applied Science. In microscopic complex systems composed of many different particles (such as solid materials), the motion of each particle is complex and is the product of a variety of strong interactions between the particle and the surrounding particles. To make it easier to understand the behavior and characteristics of these systems, physicists have redefined solids, imagining that they contain particles that are weakly interacting in free space.
These ' quasi particles ' have different types and can bring about different perceptions of material properties. This time, Christine Nanstell, a scientist at the Berlin University of Technology and his colleagues, replaced atoms in gallium nitride semiconductor crystals with atoms of germanium, while maintaining the original crystal structure and achieving a high concentration of atomic substitution.
However, such an atom substitution alters the physical properties of crystals-increasing the concentration of free electrons in solids. By analyzing the absorption and emission of these specially treated crystals from the light, the team observed a phenomenon that they thought was the stability of the new quasi particle ' collexon ', which would rise with the increase of electron gas density.
They think this could be the standard characteristic of all semiconductors-as long as the same level of atomic substitution can be achieved. If these findings can be further supported by theoretical studies, then quasi particle ' collexon ' can be considered to be a common feature of semiconductor materials.