Collective Excitons (image) University of Illinois College of Engineering Share Print E-Mail Caption This is an artist's depiction of the collective excitons of an excitonic solid. These excitations can be thought of as propagating domain walls (yellow) in an otherwise ordered solid exciton background (blue). Credit Peter Abbamonte, U. of I. Department of Physics and Frederick Seitz Materials Research Laboratory Usage Restrictions None Share Print E-Mail Disclaimer: AAAS and EurekAlert! are not responsible for the accuracy of news releases posted to EurekAlert! by contributing institutions or for the use of any information through the EurekAlert system.