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光物理系列学术报告(第103期)

作者:本站  来源:本站整理  发布时间:2014-12-5 10:48:07
 
题目The Science and Engineering of Functional Complex Oxide Thin Films – Designing Next-Generation, High-Performance Materials
 
报告人:Prof. Lane W. Martin(Department of Materials Science and Engineering, University of California, Berkeley and Materials Science Division, Lawrence Berkeley National Laboratory)
 
摘要:
Complex oxide materials possess a range of interesting properties and phenomena that make them candidates for next-generation devices and applications. But before these materials can be integrated into state-of-the-art devices, it is important to understand how to control and engineer the response of these often complex materials in a deterministic manner. In this talk we will discuss the science and engineering of thin-film versions of these materials. We will explore the role of the epitaxial thin-film growth process and the use new types of lattice mismatch strain to engineer a range of systems with special attention to ferroelectric materials. In recent years, the use of epitaxial strain has enabled the production of model versions of these complicated materials and the subsequent deterministic study of field-dependent response. Here, we will investigate how new manifestations of epitaxial constraint can enhance electric field, stress, and temperature susceptibilities (i.e., dielectric, piezoelectric, pyroelectric, and electrocaloric effects) in ferroelectrics. The presentation will highlight a comprehensiveapproach to the understanding of stimuli-dependent response of materials includingaspects of design of new high-performance materials using phenomenological models, application of epitaxial thin-film strain to produce controlled domain structures and exotic newphases, identification of domain wall contributions to response,the development of novel measurement techniques, and the fabrication and testing of rudimentary devices based on these materials. In particular, we will explore three examples of how we can push the boundaries of modern thin-film strain to control materials: 1) the production and use of strain gradients in compositionally-graded materials, 2) the use of film orientation to produce exotic domain structures and responses, and 3) a new “defect strain” pathway to push the limits of strain control of materials. The discussion will range from the development of a fundamental understanding of the physics that lies at the heart of the observed effects, to an illustration of routes to manipulate and control these effects, to the demonstration of solid-state devices based on these materials.
 
简介:
Professor Lane W. Martin is an Associate Professor of Materials Science and Engineering and a Faculty Scientist in the Materials Science Division at Lawrence Berkeley National Laboratory. Lane received his B. S. in Materials Science and Engineering from Carnegie Mellon University in Dec. 2003 and his M. S. and Ph.D. in Materials Science and Engineering from the University of California, Berkeley in 2006 and 2008, respectively.From 2008 to 2009, Lane served as a Postdoctoral Fellow in the Quantum Materials Program, Materials Science Division, Lawrence Berkeley National Laboratory. From 2009 to 2014, Lane was an Assistant Professor in the Department of Materials Science and Engineering at the University of Illinois, Urbana-Champaign. In 2014, Lane returned to the University of California, Berkeley as an Associate Professor. Lane’s research focuses on three main areas: 1) the science and engineering of thermal, electronic, and magnetic properties of materials for applications ranging from waste heat energy conversion to solid state cooling to electron emission, 2) the design and implementation of multi-functional materials for applications such as logic, memories, and sensing, and 3) the development of oxide materials for solar energy conversion including photovoltaics and photocatalysis. Lane has published nearly 100 papers and his work has been cited over 5,300 times. Lane’s work has garnered a number of awards including the Presidential Early Career Award for Scientists and Engineers (2014), the Dean’s Award for Research Excellence for the University of Illinois, Urbana-Champaign (2013), the National Science Foundation CAREER Award (2012), the Army Research Office Young Investigator Program Award (2010), a National Science Foundation IGERT Fellowship in Nanoscale Science and Engineering (2004-2007), the Intel Robert Noyce Fellowship in Microelectronics (2007-2008), the Graduate Excellence in Materials Science Award (2006), and the Materials Research Society’s Gold Medal Award for Graduate Students (2006).
 
时间:2014年10月29日下午14:30
地点:中科院物理研究所M236会议室
联系人:金奎娟 研究员 (Tel:82648099)
主办单位:中国科学院光物理重点实验室
 
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