Figure 1 (IMAGE) Japan Science and Technology Agency Caption Schematic diagram of the charge model. The effect of electron-electron interactions is integrated by adding multiple-holon-doublon-pair basis states (right) to one-holon-doublon basis states (left). Here, black dots represent singly occupied sites. Credit Nagoya Institute of Technology Usage Restrictions None 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.