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Abstract:
We present measurement and analysis of field-dependent specific heat
measurements on Sr3Ru2O7, showing that, at low temperatures, an
incipient divergence is cut off by the formation of a new phase
previously identified to show the transport properties of an electronic
nematic. We discuss how to interpret a specific heat divergence in a
system with van Hove singularities, and caution against a simple-minded
comparison of experimentally determined power laws with the predictions
of quantum critical theories. (C) 2010 WILEY-VCH Verlag GmbH & Co. KGaA,
Weinheim