Opportunities in vanadium-based strongly correlated electron systems
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Functional Oxides Prospective Article
Opportunities in vanadium-based strongly correlated electron systems Matthew Brahlek, Lei Zhang, Jason Lapano, Hai-Tian Zhang, and Roman Engel-Herbert, Department of Materials Science and Engineering, Pennsylvania State University, University Park, Pennsylvania 16801, USA Nikhil Shukla, and Suman Datta, Department of Electrical Engineering, University of Notre Dame, Notre Dame, Indiana 46556, USA Hanjong Paik, and Darrell G. Schlom, Department of Material Science And Engineering, Cornell University, Ithaca, New York 14853, USA Address all correspondence to Roman Engel-Herbert at [email protected] (Received 12 October 2016; accepted 12 January 2017)
Abstract The diverse and fascinating properties of transition metal oxides stem from the strongly correlated electronic degrees of freedom; the scientific challenge and range of possible applications of these materials have caused fascination among physicists and materials scientists, thus capturing research efforts for nearly a century. Here, we focus on the binary VxOy and the ternary perovskite AVO3 and review the key aspects from the underlying physical framework and their basic properties, recent strides made in thin-film synthesis, to recent efforts to implement vanadium-based oxides for practical applications that augment existing technologies, which surpass limitations of conventional materials.
Introduction Living in the information age we are surrounded by technology that enables us to solve problems on a daily basis, which were thought to be intangible just a couple of decades ago. High-performance computation, ubiquitous communication as well as instant storage of large sets of data have allowed information technology to transform virtually all aspects of our lives and has changed society in an irrevocable way: computer-aided design strategies to develop new products, realistic simulations to predict and verify their functionalities, control of robotic manufacturing processes, and the role of computers to orchestrate complex processes, such as managing supply chains in industry or large-scale science experiments. Furthermore, new social media have emerged and videoconferencing platforms enable fast, high quality, personal interaction in affordable ways. Similarly, cloud computing allows sharing large data sets and provides concurrent access from all over the world in real time. All these examples attest to the ways in which information technology has revolutionized how we construct, build, communicate, and understand our world. Without any doubt, semiconductor materials in general, and silicon in particular, constitute the material basis for all these opportunities. In semiconductors, two key functionalities are ideally met—(1) modulating the flow of charge carriers by an applied electric field thereby enabling manipulation, amplification, and storage of electrical signals; and (2) transducing electrical signals into optical signals and vice versa at very fast time scales. Improved synthesis and fabrication technologies of these
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