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arXiv · 0906.2646

Quantum criticality in Yb(Rh0.97Co0.03)2Si2 probed by low-temperature resistivity

Sven Friedemann·Niels Oeschler·Cornelius Krellner·Christoph Geibel·Frank Steglich
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Abstract

Quantum criticality in Yb(Rh0.97Co0.03)2Si2 is investigated by means of resistivity and magnetoresistance. The partial substitution of Co leads to a stabilization of the magnetism as expected according to the application of chemical pressure for Yb systems. However, the signature of the Kondo-breakdown remains at the same position in the temperature-magnetic field phase diagram compared to stoichiometric YbRh2Si2. As a consequence, the Kondo-breakdown is situated within the antiferromagnetic phase. These results fit well within the global phase diagram under chemical pressure [1].

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Sven Friedemann, Niels Oeschler, Cornelius Krellner, Christoph Geibel, Frank Steglich. 2009-06-15. Quantum criticality in Yb(Rh0.97Co0.03)2Si2 probed by low-temperature resistivity. https://doi.org/10.1088/1742-6596/200/1/012038

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