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SYPT: Symposium Quantum Phase Transitions

SYPT 1: SYPT

SYPT 1.2: Invited Talk

Monday, February 25, 2008, 14:35–15:10, H 0105

Quantum criticality in YbRh₂Si₂ — •Philipp Gegenwart — I. Physik Institut, Georg-August Universitaet Goettingen, Friedrich-Hund Platz 1, 37077 Goettingen

In the talk, I will discuss different scenarios for quantum criticality in heavy fermion systems. In particular, I will focus on the system YbRh₂Si₂ which displays a new type of quantum critical point with multiple vanishing energy scales [1] and present most recent results on this system.

Work in collaboration with T. Westerkamp, J.-G. Donath, C. Krellner, M. Brando, C. Stingl, Y. Tokiwa, S. Paschen, C. Geibel, F. Steglich, E. Abrahams and Q. Si.

[1] P. Gegenwart et al., Science 315, 5814 (2007).