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Unconventional magnetic field effect on noise properties of AlOx thin films in Kondo-like transport regime

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Abstract

Granular aluminum oxide is an interesting material for application in quantum circuits. However, several issues regarding its normal state transport properties are still open. Here, detailed DC and noise transport measurements have been performed on thin films of granular Al oxide. The results evidence the presence of a Kondo-type resistivity increase at low temperatures, where specific excess 1/f noise is observed. The magnetic dependence of the excess noise further strengthens its connection with the Kondo mechanism.

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Authors and Affiliations

  1. Dipartimento di Fisica “E.R. Caianiello” and CNR-SPIN Salerno, Università di Salerno, 84084, Fisciano, Salerno, Italy

    Carlo Barone, Costantino Mauro & Sergio Pagano

  2. Physikalisches Institut, Karlsruhe Institute of Technology, 76131, Karlsruhe, Germany

    Hannes Rotzinger, Dominik Dorer & Alexey V. Ustinov

  3. Dipartimento di Ingegneria, Università del Sannio, 82100, Benevento, Italy

    Costantino Mauro

  4. Russian Quantum Center, National University of Science and Technology MISIS, 119049, Moscow, Russia

    Alexey V. Ustinov

Authors
  1. Carlo Barone
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  2. Hannes Rotzinger
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  3. Costantino Mauro
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  4. Dominik Dorer
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  5. Alexey V. Ustinov
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  6. Sergio Pagano
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Correspondence to Carlo Barone.

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Barone, C., Rotzinger, H., Mauro, C. et al. Unconventional magnetic field effect on noise properties of AlOx thin films in Kondo-like transport regime. Eur. Phys. J. Spec. Top. 228, 697–702 (2019). https://doi.org/10.1140/epjst/e2019-800146-1

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  • DOI: https://doi.org/10.1140/epjst/e2019-800146-1

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