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UID:DSC-857
DTSTART;TZID=Europe/Berlin:20110526T140000
SEQUENCE:1306395315
TRANSP:OPAQUE
DTEND;TZID=Europe/Berlin:20110526T151500
URL:https://dresden-science-calendar.de/calendar/de/detail/857
LOCATION:MPI-PKS\, Nöthnitzer Straße 3801187 Dresden
SUMMARY:Berg: A sign of change: pinning down the order parameter symmetry o
 f the iron-based superconductors
CLASS:PUBLIC
DESCRIPTION:Speaker: Erez Berg\nInstitute of Speaker: Harvard - USA\nTopics
 :\nPhysik\n Location:\n  Name: MPI-PKS (Room 1D1)\n  Street: Nöthnitzer S
 traße 38\n  City: 01187 Dresden\n  Phone: + 49 (0)351 871 0\n  Fax: \nDes
 cription: The iron-based superconductors\, discovered a few years ago\, ho
 ld a great promise\, from both a technological and a scientific point of v
 iew. With an unusually high maximum critical temperature exceeding 50K\, s
 econd only to that of the so-called copper-oxide high-temperature supercon
 ductors\, they are likely to belong to a class of \"unconventional\" super
 conductors\, whose mechanism lies beyond the Bardeen-Cooper-Schrieffer the
 ory of phonon-mediated pairing. A crucial step to unveil the mechanism of 
 superconductivity in these materials is to understand the structure of the
 ir order parameter. In this talk\, I will discuss theoretical investigatio
 ns of the iron-based superconductors\, which indicate an exotic order para
 meter with an internal sign change. Experimentally\, detecting such a sign
  change poses a significant challenge. I will show how a recent intriguing
  experiment\, which shows fractional flux quantization in a composite supe
 rconducting loop\, can be intepreted as evidence for a sign-changing order
  parameter.
DTSTAMP:20260429T224917Z
CREATED:20110520T073517Z
LAST-MODIFIED:20110526T073515Z
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