Quantum Saturation of Capacitance for surface analysis

ORAL

Abstract

The electronic capacitance in between two electrodes saturate to the quantum capacitance when their separation distance is decreased [T. Christen and M Buttiker. Phys. Rev. Lett. 77,1 (1996)].

 

Using a Scanning Tunneling Microscope at low temperatures we study the variations of the capacitance as a function of the interelectrode distance.  Quantum capacitance reveals variations in the Local Density of States for different metals and surface preparations.  

*Financial support by the Spanish goverment through PID 2019-109539GB-C41, the Generalitat Valenciana (PROMETEO/2021/017 and CDEIGENT/2018/028) are gratefully acknowledged.

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Presenters

  • Carlos Untiedt

    • Univ de Alicante

Authors

  • Carlos Untiedt

    • Univ de Alicante

  • Tamara de Ara García

    • Departamento de Física Aplicada, Unidad asociada al CSIC, Universidad de Alicante, Campus de San Vicente del Raspeig, Alicante, Spain
    • Universidad de Alicante

  • Bernat Olivera

    • Universidad de Alicante

  • Carlos Sabater

    • Univ de Alicante
    • Departamento de Física Aplicada and Unidad Asociada CSIC, Universidad de Alicante, Campus de San Vicente del Raspeig, E-03690 Alicante, Spain