Publicación: Superconductivity and non-Fermi-liquid behavior of La3Pd4Si4 and Ce3Pd4Si4
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Fil: Sereni, J. Comisión Nacional de Energía Atómica. Instituto Balseiro. Laboratorio de Bajas Temperaturas; Argentina
Fil: Kneidinger, F. Vienna University of Technology; Austria
Fil: Michor, H. Vienna University of Technology; Austria
Fil: Bauer, E. Vienna University of Technology; Austria
Fil: Gribanov, A. Moscow State University; Rusia
Fil: Lipatov, A. Moscow State University; Rusia
Fil: Seropegin, Y. Moscow State University; Rusia
Fil: Rogl, P. University of Vienna; Austria
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Centro Atómico Bariloche
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eng
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Measurements of temperature and field dependent bulk properties have been carried out on {Ce,La}3Pd4Si4. Rietveld refinements of x-ray powder intensity data confirm the orthorhombic U3Ni4Si4-type structure for both compounds. While La3Pd3Si4 exhibits superconductivity below 2 K together with some indications of a two gap scenario, the former can be characterized as a Kondo lattice system in presence of crystalline electric field splitting. Due to the closeness of a quantum critical point, distinct non-Fermi-liquid features dominate the low temperature physics of Ce3Pd4Si4.
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Physical Review B. Vol. 88, no. 2 (2013), p. 024423