Energy Band Gap (IMAGE) RIKEN Caption An energy band gap is obtained using energy spectroscopy. Existence of band gap establishes that coherent tunneling has occurred. Credit RIKEN Usage Restrictions The image may only be used with appropriate caption or credit License Licensed content 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.