Dresden 2006 – wissenschaftliches Programm
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TT: Tiefe Temperaturen
TT 25: Correlated Electrons - Poster Session
TT 25.76: Poster
Mittwoch, 29. März 2006, 14:30–18:30, P1
Electronic structure, thermodynamics and transport properties of CeRh2Sn4 — •Monika Gamza1, Walter Schnelle2, Andrzej Slebarski1, and Helge Rosner2 — 1Institute of Physics, University of Silesia, Katowice, Poland — 2MPI CPfS Dresden
In the last years, CeRhSn was intensively investigated because it exhibits a non-Fermi-Liquid (NFL) character of the physical properties in a region of low temperatures. Recent results [1,2] confirm that CeRhSn is placed in the vicinity of an antiferromagnetic instability and indicate the significant role of atomic disorder in the formation of the NFL state.
Here, we present a study of the compound CeRh2Sn4 which has not yet been investigated so far. The Ce 3d x-ray photoelectron spectroscopy (XPS) spectrum indicates a mixed valence of Ce suggesting similarities to the above mentioned CeRhSn. We present a combined experimental and theoretical study based on thermodynamic data (heat capacity, magnetic susceptibility and resistivity) and spectroscopic data (XPS) together with ab-initio band structure calculations.
For a clear presentation of the unusual electronic properties we compare CeRh2Sn4 with the non-magnetic isostructural reference system LaRh2Sn4.
Supported by the State Commitee for Scientific Research (KBN) through Grant No. 1 P03B 052 28 and by the DFG, Emmy Noether-program.
[1] A. Ślebarski et al., Phys. Rev. B 72 (2005), 085443.
[2] H. Tou et al., Phys. Rev. B 70 (2004), 100407.