New research has shed light on the behavior of one type of three-particle cluster and proposed a distinct relationship with the ratio between the masses of its particles. In an experiment, researchers examined a cluster comprising two electrons with ordinary masses, and one hole which could vary between one and two-electron masses.  With the help of calculations,  researchers witnessed distinctive behaviors that demonstrated clear associations with the ratio between the mass of this heavier hole. Researchers are now hoping these formulas could be improved to define clusters holding four or more particles with varying masses to generate new opportunities to understand the characteristics of real semiconductors in future studies.