Proton-gated Transistor (image) Harvard John A. Paulson School of Engineering and Applied Sciences Share Print E-Mail Caption 'This is a new type of correlated transistor where the transistor action is gated by an ionic field,' says principal investigator Shriram Ramanathan. Credit Image courtesy of Jian Shi. Usage Restrictions Editorial use only. 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.