[Zurück]

S. Paschen, M. Müller, J. Custers, M. Kriegisch, A. Prokofiev, G. Hilscher, W. Steiner, A.P. Pikul, F. Steglich, A.M. Strydom:
"Quantum critical behaviour in Ce₃Pd₂₀Si₆?*";
Journal of Magnetism and Magnetic Materials, 316 (2007), S. 90 - 92.

Quantum critical behaviour in Ce₃Pd₂₀Si₆?*

S. Paschen a, M. Müller a, J. Custers a, M. Kriegisch a, A. Prokofiev a, G. Hilscher a, W. Steiner a, A. Pikul b, F. Steglich b, A.M. Strydom c

a Institute of Solid State Physics, Vienna University of Technology, 1040 Vienna, Austria
b Max Planck Institute for Chemical Physics of Solids, 01187 Dresden, Germany
c Department of Physics, University of Johannesburg, Auckland Park 2006, South Africa

Abstract
The cage compound Ce₃Pd₂₀Si₆ has recently been shown to undergo two successive low-temperature phase transitions which are strongly affected by an applied magnetic field. Here we show that, as the lower, probably antiferromagnetic transition is suppressed to zero in a field slightly above 1T, the electrical resistivity shows a non-Fermi-liquid-like linear-in-T temperature dependence while it follows the usual Fermi liquid T² temperature dependence both at smaller and larger fields. This suggests that a field-induced quantum critical point exists in Ce₃Pd₂₀Si₆.

Ce₃Pd₂₀Si₆; Quantum criticality; Resistivity

http://dx.doi.org/10.1016/j.jmmm.2007.04.001

http://dx.doi.org/10.1016/j.jmmm.2007.04.001