Non-Fermi liquid states in the pressurized CeCu2(Si1-xGex)2 system: two critical points |
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| Authors: | Yuan H Q Grosche F M Deppe M Sparn G Geibel C Steglich F |
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| Affiliation: | Max-Planck-Institute for Chemical Physics of Solids, N?thnitzer Strasse 40, 01187 Dresden, Germany. yuan@mrl.uiuc.edu |
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| Abstract: | In the archetypal strongly correlated electron superconductor CeCu2Si2 and its Ge-substituted alloys CeCu2(Si1-xGex)2 two quantum phase transitions--one magnetic and one of so far unknown origin-can be crossed as a function of pressure. We examine the associated anomalous normal state by detailed measurements of the low temperature resistivity (rho) power-law exponent alpha. At the lower critical point (at pcl, 1
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