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Transport properties of EuTiO<sub>3-δ</sub><sub> </sub>down to 50 mK

ORAL

Abstract

Tetravalent perovskite titanates garnered great attention due to its unique dielectric properties. Within the family, the electron-doped SrTiO3 was found to be superconducting below 1 K; its superconducting transition temperature has a dome-shaped dependence with carrier concentration [1]. Low temperature transport properties of electron-doped SrTiO3 can be described by Fermi liquid theory [2]. Cubic perovskite EuTiO3 has identical Ti-O subarray as SrTiO3. However, interaction between mobile electron spins and magnetic moments in Eu3+ may dramatically change transport properties. So far, transport properties of EuTiO3 at sub Kelvin temperatures have not been studied. We obtained high quality single crystal EuTiO3 by floating zone method; oxygen deficiency is introduced by annealing the crystal at different temperatures. These samples are characterized by suite of measurements including resistivity, specific heat capacity, and Seebeck coefficient. The electron doping converts the crystal from semiconductor to metal. As revealed by the resistivity and the specific heat, EuTiO3-δ exhibits filamentary superconductivity at 1.4 K.
[1] C. Koonce et al, Phys. Rev. 163, 380.
[2] V. Marel et al, Phys. Rev. B 84.20 205111.

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Presenters

  • Jiaming He

    Department of Mechanical Engineering, University of Texas at Austin, Materials Science and Engineering program, Department of Mechanical Engineering, University of Texas at Austin

Authors

  • Jiaming He

    Department of Mechanical Engineering, University of Texas at Austin, Materials Science and Engineering program, Department of Mechanical Engineering, University of Texas at Austin

  • Jianshi Zhou

    Geological Sciences, University of Texas at Austin, Department of Mechanical Engineering, The University of Texas at Austin, Walker Department of Mechanical Engineering, University of Texas at Austin, Department of Mechanical Engineering, University of Texas at Austin, The University of Texas at Austin, University of Texas at Austin, University of Texas, Materials Science and Engineering program, Department of Mechanical Engineering, University of Texas at Austin