Condensed-Matter Physics & Materials Science Seminar

"Quantum Kondo Volume Collapse"

Presented by Maxim Dzero, Rutgers University

Thursday, April 12, 2007, 1:30 pm — Small seminar room, Bldg. 510

The Kondo volume collapse describes certain valence
transitions in f electron
metals, and is characterized by a line of first order transitions in
the pressure-temperature
phase plane terminated at critical end points. Under certain
conditions, the lower critical
end point can be tuned to zero temperature. I will discuss this
quantum critical end point within the context of a
slave boson treatment of the Anderson lattice, and calculate the
critical exponents for
the specific heat, thermal expansion, and compressibility. We find
that the inclusion of
quantum critical fluctuations leads to a novel bifurcation of the
first order phase line.
Finally, we comment on the relevance of our results for the
observation of superconductivity
near such critical points.

Hosted by: Robert Konik

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