Thermoelectric power as a probe of density of states in correlated actinide materials: the case of PuCoGa${}_5$ superconductor

Abstract

We present measurements of the thermoelectric power of the plutonium-based unconventional superconductor PuCoGa${}_5$. The data is interpreted within a phenomenological model for the quasiparticle density of states of intermediate valence systems and the results are compared with results obtained from photoemission spectroscopy. The results are consistent with intermediate valence nature of 5$f$-electrons, furthermore, we propose that measurements of the Seebeck coefficient can be used as a probe of density of states in this material, thereby providing a link between transport measurements and photoemission in strongly correlated materials. We discuss these results and their implications for the electronic structure determination of other strongly correlated systems, especially actinide materials.

arXiv commentAccepted for publication in Phys. Rev. B (October 24, 2016)

References in corpus (10)

• Electronic Structure Calculations with Dynamical Mean-Field Theory: A Spectral Density Functional Approach
• Fermi-liquid instabilities at magnetic quantum phase transitions
• Nature of the 5f states in actinide metals
• On the thermoelectricity of correlated electrons in the zero-temperature limit
• Coherence scale of the Kondo lattice
• Theory of the thermoelectricity of intermetallic compounds with Ce or Yb ions
• Photoemission and the Electronic Structure of PuCoGa5
• Avoided Valence Transition in a Plutonium Superconductor
• Electronic Structure and Correlation Effects in PuCoIn5 as compared to PuCoGa5
• High-pressure transport properties of CeRu_2Ge_2

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