Kondo Insulating State in CeRhSb1-xSnx as a Function of Carrier Number and Its Subsequent Metallization
A. Ślebarskia and J. Spałekb
aInstitute of Physics, University of Silesia, Uniwersytecka 4, 40-007 Katowice, Poland
bMarian Smoluchowski Institute of Physics, Jagiellonian University, Reymonta 4, 30-059 Kraków, Poland
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Received: 14 09 2006;
A quantum critical point represents an essential singularity in the phase diagram of the electron-correlated compounds. In the CeRhSb1-xSnx system we have observed a quantum criticality at the boundary Kondo insulator-non-Fermi liquid state. In this series of compounds, CeRhSb has a Kondo insulating ground state, whereas CeRhSn exhibits a non-Landau Fermi liquid behavior. In view of different types of behavior of CeRhSb and CeRhSn, we review the results of the solution in CeRhSb1-xSnx and discuss the effect of a quasi-continuous change of the number of conduction electrons on the gap formation in the Kondo-insulating regime, as well as on the critical behavior appearance near the quantum critical point.
DOI: 10.12693/APhysPolA.111.487
PACS numbers: 71.27.+a, 72.15.Qm, 71.30.+h