Shedding infrared light on high-Tc superconductivity

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Date/Time:Monday, 04 Oct 2010 from 4:10 pm to 5:10 pm
Location:Physics, Room 5
Contact:Ruslan Prozorov
Phone:515-294-9901
Channel:Colloquium
Categories:Lectures
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Dimitri N. Basov (University of California San Diego)

The mechanism of high-Tc superconductivity is one of the most challenging unresolved problems in contemporary physics. The recent discovery of high Tc superconductivity in the iron pnictides, while interesting in itself, offers a new perspective on several aspects of cuprate high-Tc superconductors. In this talk, I will overview common patterns as well as contrasting trends between the two classes of high-Tc materials, focusing on the information generated through infrared/optical probes. Infrared methods enable experimental access to energy gaps in a superconductor, strong coupling effects responsible for pairing, the collective response of the superfluid and allow one to quantify the strength of electronic correlations [Nature-Physics 5, 647 (2009)]. With this panoramic view of effects central for our understanding of superconductivity I will attempt to identify factors favoring higher Tc in exotic superconductors.
(more info at: http://infrared.ucsd.edu).