Electric-Field Effects in High Temperature Superconducting Thin Films

小行星9404579 技术摘要：重点将放在高Tc超导薄膜中的电场效应的研究，这是一个与三端超导器件开发密切相关的课题。 本文的目的是对高温超导场效应晶体管（SuFET）的发展前景作一全面的评价。 基于现有的数据，两个材料问题已被确定为当前器件性能的限制因素：SrTiO 3（STO）介电层的质量和YBCO超导薄膜的质量。 为了支持项目目标，将在这两个方向上开展工作，以改善器件性能。 除了研究和优化独特的SuFET应用，如SQUID电路和微波谐振器的器件特性实验将继续进行，并扩展到新的器件概念。 与此同时，将继续进行高温超导体场效应物理学的基础研究。 非技术摘要：该计划的目的是研究电场对高温超导体性能的影响。 研究表明，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，可以设计新颖的器件，其中通过使用电场来改变器件特性。 为了理解这一现象的科学性和全部器件潜力，制造高质量的薄膜基结构至关重要。 该计划的目标之一是了解和优化材料生长过程。 预计通过该计划将更好地了解三端超导装置的潜力。 ***

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. ***