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Center for Nonlinear Studies |
When interactions between constituent particles become sufficiently strong, quantum systems often display appearance of non-trivial collective excitations and novel phases of matter. I will elaborate this concept of quantum emergence on the example of a "strange metal" phase in heavy fermion materials. In particular, magnetic frustrations are often present in these compounds and when combined with the Kondo interaction, they may result in such a non-Fermi liquid "critical metal" phase, believed to exist for instance in YbRh2Si2 and YbAlB4 families of materials. We will discuss in particular the theoretical implications of the observed T/B scaling and unconventional critical exponents in beta-YbAlB4.
Host: Cristian Batista