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.

arXiv comment15 pages, 4 figures, accepted in Phys. Rev. B

References in corpus (5)

• Magnetic-Field Induced Quantum Critical Point in YbRh${}_2$Si${}_2$
• On the thermoelectricity of correlated electrons in the zero-temperature limit
• Theory of the thermoelectricity of intermetallic compounds with Ce or Yb ions
• Theory of Quasi-Universal Ratio of Seebeck Coefficient to Specific Heat in Zero-Temperature Limit in Correlated Metals
• Probing the phase diagram of CeRu_2Ge_2 by thermopower at high pressure

Cited by in corpus (26)

• Metallic Quantum Ferromagnets
• Field-induced transition from even to odd parity superconductivity in CeRh${}_2$As${}_2$
• Ferromagnetic Quantum Criticality in the Quasi-One-Dimensional Heavy Fermion Metal YbNi4P2
• Magnetic field tuned quantum criticality of heavy fermion system YbPtBi
• Evolution of the Kondo lattice and non-Fermi liquid excitations in a heavy-fermion metal
• Hall effect measurements on YbRh2Si2 and relatives in the light of electronic structure calculations
• Single crystal growth of YbRh2Si2 and YbIr2Si2
• Hall effect in heavy-fermion metals
• Why could Electron Spin Resonance be observed in a heavy fermion Kondo lattice?
• Electron Spin Resonance of the Yb 4f moment in Yb(Rh1-xCox)2Si2
• Thermoelectric Power of the YbT${}_2$Zn${}_{20}$ (T = Fe, Ru, Os, Ir, Rh, and Co) Heavy Fermions
• Interplay between unconventional superconductivity and heavy-fermion quantum criticality: CeCu${}_2$Si${}_2$ versus YbRh${}_2$Si${}_2$
• Lifshitz transitions and quasiparticle de-renormalization in YbRh${}_2$Si${}_2$
• Valence effect on the thermopower of Eu systems
• Enhancement of thermal transport in the degenerate periodic Anderson model
• Break up of heavy fermions at an antiferromagnetic instability
• Kondo-hole substitution in heavy fermions: dynamics and transport
• Low-temperature thermopower study of YbRh2Si2
• Dependence of transport coefficients of Yb(Rh${}_{1-x}$Co${}_x$)${}_2$Si${}_2$ intermetallics on temperature and cobalt concentration
• Spin relaxation in Kondo lattices
• Static and dynamical magnetic properties of the extended Kitaev-Heisenberg model with spin vacancies
• Scaling behavior of the thermopower of the archetypical heavy-fermion metal $\mathrm{YbR}{\mathrm{h}}_2\mathrm{S}{\mathrm{i}}_2$
• CeCu${}_2$Si${}_2$ and YbRh${}_2$Si${}_2$: Strange Cases of Heavy-Fermion Superconductivity
• Tensile and compressive strain tuning of a Kondo lattice
• Observation of field-induced single-ion magnetic anisotropy in a multiorbital Kondo alloy $(\mathrm{Lu},\mathrm{Yb}){\mathrm{Rh}}_2{\mathrm{Zn}}_{20}$
• Dimensionality tuning of heavy-fermion states in ultrathin CeSi2 films