2021/04/23 by Bikash Ghosh, Soumik Mukhopadhyay
Materials Science · Physics and Astronomy · #Advanced Condensed Matter Physics #Condensed matter physics #Electrical resistivity and conductivity #Magnetic and transport properties of perovskites and related materials #Materials science #Physics #Physics of Superconductivity and Magnetism #Quantum mechanics #Seebeck coefficient #cond-mat.str-el
paper · pdf · doi:10.1103/physrevb.103.165135
7 pages, 5 figures, published in PRB
openalex publication_date 2021/04/23 · arxiv created 2021/04/27 · arxiv updated 2021/05/12 · openalex created_date 2021/05/24 · openalex updated_date 2026/08/05
We present experimental evidence of incoherent Kondo scattering as the source of resistivity minima in bulk polycrystalline and nanocrystalline Pr2Ir2O7. The temperature dependence of thermopower shows a positive maximum at high temperature followed by a negative minimum at low temperature, with the sign inversion occurring at a much higher temperature than TK. Moreover, we observe little correlation between TK and intersite coupling strength given by |\ensuremathθCW|. We describe the temperature dependence of thermopower and resistivity within the framework of crystal field excitation in a Kondo lattice.