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R. G. Herb Condensed Matter Seminar
Phases of Complex Oxides Driven Out of Equilibrium
Date: Thursday, September 24th
Time: 4:30 pm
Place: 5310 Chamberlin Hall
Speaker: John Freeland , Argonne National Lab
Abstract: Functional oxides based on the transition metal series display a wide spectrum of remarkable electronic properties including magnetism, superconductivity and metal-insulator transitions, which offer potential important properties for practical applications including colossal responses to external fields, switchable conductivity, and efficient energy conversion. However, under these conditions for application, these systems tend to be driven far away from the equilibrium ground-state. In order to harness these materials for the future, one of the grand challenges is to understand how to map the non-equilbrium phase space both to seek conditions where new states emerge but also as a basis for the design of materials that will help meet the energy needs of the future. In this talk, I will touch on recent work ranging from optical excitation[1,2] to catalysis[3,4] to watching how materials grow[5] as an introduction to how some of the forefront X-ray tools are helping us to scratch the surface of this problem.<br>
Work at Argonne is supported by the U.S. Department of Energy, Office of Science, under Contract No. DE-AC02-06CH11357.<br>
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[1] H. Wen et al. Phys. Rev. Lett. 110, 37601 (2013).<br>
[2] H. Wen et al. Physical Review B 88,165424 (2013).<br>
[3] H. Jeen et al. Nature Materials 12, 1056 (2013).<br>
[4] S.-.H Chang et al. Nature Communications 5, 4191 (2014).<br>
[5] J.H. Lee et al. Nature Materials 13, 879 (2014).<br>
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Host: McDermott
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