Electric field control of materials properties with electrolyte gating technique

电场对材料性能的控制是固体科学中长期存在的问题之一。利用这种技术，人们可以观察到载流子掺杂后的无无序现象，并发现用化学方法无法产生的新电子态。在这个项目中，我们将采用电化学的概念，用电场来控制材料的性质。这个项目的目的是探索这个迄今为止从未被场效应达到的极端电荷掺杂的新窗口，在精心选择的材料中寻找和控制物质的新状态。我们已经实现了：(1)观察了电场诱导多种材料（如本征半导体：VO2和SrTiO3）的金属到绝缘体的转变，(2)观察了电场对Co中磁有序和相变的控制，(3)利用EDL门控技术开发了新型发光二极管。

Electric field control of materials properties is one of the longstanding issues in solid-state science. With this technique one can observe disorder-free phenomena upon carrier doping and find novel electronic states that are impossible to generate in a chemical way. In this project, we are going to employ an electrochemical concept to control materials properties with an electric field. The purpose of this project is to explore this new window of extreme charge doping that has never been reached so far by field effect, to search for and control novel states of matter in well chosen materials. We have achieved : (1) observation of electric field induced metal-to-insulator transition in variety of materials such as intrinsic semiconductors: VO2, and SrTiO3, (2) observation of electric field control over magnetic ordering and phase transitions in Co, (3) development of new light-emitting diodes with EDL gating technique.