Abstract

We report on thermal transport properties of the heavy-fermion compound YbRh 2 Si 2 . Thermal conductivity κ and thermopower S measurements on single-crystalline samples of YbRh 2 ( Si 1 - x Ge x ) 2 with x = 0 and 0.05 in the temperature range between 2 and 300 K are presented. In this region, the transition from incoherent to coherent Kondo scattering and crystal electric field excitations play a major role in the transport and scattering processes of the system.

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