Heterostructure (image) University of Washington Share Print E-Mail Caption This is an illustration of the strong valley exciton interactions and transport in a 2-D semiconductor heterostructure. Credit Kyle Seyler, Pasqual Rivera Usage Restrictions Must include credit. 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.