Energy scales of Lu(1-x)Yb(x)Rh2Si2 by means of thermopower investigations

Abstract

We present the thermopower S(T) and the resistivity rho(T) of Lu(1-x)Yb(x)Rh2Si2 in the temperature range 3 K < T < 300 K. S(T) is found to change from two minima for dilute systems (x < 0.5) to a single large minimum in pure YbRh2Si2. A similar behavior has also been found for the magnetic contribution to the resistivity rho_mag(T). The appearance of the low-T extrema in S(T) and rho_mag(T) is attributed to the lowering of the Kondo scale with decreasing x. The evolution of the characteristic energy scales for both the Kondo effect and the crystal electric field splitting are deduced. An extrapolation allows to estimate the Kondo temperature of YbRh2Si2 to 29 K.

15 pages, 4 figures, accepted in Phys. Rev. B

References in corpus (2)

• On the thermoelectricity of correlated electrons in the zero-temperature limit
• Probing the phase diagram of CeRu_2Ge_2 by thermopower at high pressure

Cited by in corpus (12)

• Field-induced transition from even to odd parity superconductivity in CeRh${}_2$As${}_2$
• Magnetic field tuned quantum criticality of heavy fermion system YbPtBi
• Hall effect in heavy-fermion metals
• Valence effect on the thermopower of Eu systems
• Enhancement of thermal transport in the degenerate periodic Anderson model
• Kondo-hole substitution in heavy fermions: dynamics and transport
• Low-temperature thermopower study of YbRh2Si2
• Static and dynamical magnetic properties of the extended Kitaev-Heisenberg model with spin vacancies
• Observation of field-induced single-ion magnetic anisotropy in a multiorbital Kondo alloy $(\mathrm{Lu},\mathrm{Yb}){\mathrm{Rh}}_2{\mathrm{Zn}}_{20}$
• Tensile and compressive strain tuning of a Kondo lattice
• CeCu${}_2$Si${}_2$ and YbRh${}_2$Si${}_2$: Strange Cases of Heavy-Fermion Superconductivity
• Dimensionality tuning of heavy-fermion states in ultrathin CeSi2 films