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Condensed Matter Colloquium Thursday, February 2, 2012

Summary: Condensed Matter Colloquium
Thursday, February 2, 2012
2 pm, Room 1201
Refreshments at 1:30 pm in Room 1305F
Gabriel Kotliar
Department of Physics, Rutgers University
Sleuthing Hidden Order in Correlated Materials:
A Case Study on URu2Si2
A long standing mystery in condensed matter physics is the nature of the ordered
state that sets in at 17 K in a uranium-based strongly correlated electron heavy
fermion material URu2Si2. In spite of a clear phase transition with an entropy of a
fraction of log(2), experimentalists and theorists alike have not been able to
conclusively decipher what degrees of freedom order in the low temperature
phase. In the last three years there has been a concerted effort by the condensed
matter community to apply the latest experimental and theoretical tools to this
problem. In this colloquium, I will review the key experimental constraints
emerging from these studies. Then I will describe our recent proposal, motivated
by Dynamical Mean Field Theory calculations, to understand the hidden order in
terms of hexadecapolar order. I will conclude by framing this problem in the
more general challenge of understanding strongly correlated materials.


Source: Appelbaum, Ian - Department of Physics, University of Maryland at College Park


Collections: Engineering; Materials Science