Electric-Field Effects in High Temperature Superconducting Thin Films

9404579 Venkatesan技术摘要：重点是研究高温超导薄膜中的电场效应，这是一个与三端超导器件的发展密切相关的课题。其目的是对高温超导场效应管(SuFET)的前景进行全面的评估。根据已有的数据，目前器件性能的限制因素有两个：钛酸锶(STO)介质层的质量和YBCO超薄膜的质量。为了支持项目目标，将在这两个方向上进行工作，以改善设备的性能。除了研究和优化器件特性外，还将继续对独特的SuFET应用进行实验，例如在SQUID电路和微波谐振器中，并将其扩展到新的器件概念。同时，高温超导体中场效应物理的基础研究也将继续进行。非技术摘要：该程序的目的是研究电场对高温超导体性能的影响。结果表明，利用电场可以改变超导体的转变温度和最大载流能力。因此，人们可能能够设计通过使用电场来改变器件属性的新型器件。为了理解这种现象的科学性以及整个器件的潜力，制备高质量的薄膜结构是必不可少的。该项目的目标之一是了解和优化材料生长过程。预计这项计划将对三个终端超导装置的潜力有更好的理解。***

9404579 Venkatesan Technical abstract: Focus will be on the study of electric-field effects in high Tc superconducting thin films, a topic closely related to the development of three-terminal superconducting devices. The objective is to obtain a comprehensive assessment of the prospects for high Tc Supercccconducting Field-Effect Transistors (SuFET). Based on the existing data, two material problems have been identified as the limiting factors for the current device performance: the quality of the SrTiO3 (STO) dielectric layer and the quality of YBCO ultrathin films. In support of the project objective, work will be done in these two directions to improve the device properties. In addition to the study and optimization of the device characteristics experiments on unique SuFET applications, such as in SQUID circuits and microwave resonators will be continued and also extended to new device concepts. At the same time, the basic study of the physics of field effects in high Tc superconductors will continue. Non-technical abstract: The aim of the program is to investigate the effect of electric fields on the properties of the high temperature superconductors. It has been shown that by use of electric fields the transition temperature and the maximum current carrying ability of superconductors can be modified. Thus, one may be able to design novel devices where the device properties are modified by the use of electric fields. In order to understand the science as well as the full device potential of this phenomenon it is essential to fabricate high quality thin film based structures. One of the goals of this program is to understand and optimize the materials growth process. It is expected that a better understanding for the potential of three terminal superconducting devices will emerge from this program. ***