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Tunneling experiments on amorphous and crystalline superconducting tantalum films

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Zeitschrift für Physik B Condensed Matter

Abstract

The energy gap and the transition temperature of amorphous and crystalline superconducting Ta films are measured by tunneling experiments. The following values are obtained: 2Δ(0)=0,65 meV,T c=2,11 K for the amorphous state after quenched condensation and 2Δ(0)=1,24 meV,T c=4,06 K for the crystalline state after annealing at room temperature. The reduced energy gap 2Δ(0)/kT c=3,58 demonstrates that amorphous Ta films are weak-coupling superconductors. The crystallization of the amorphous Ta films takes place at 250 K.

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Authors and Affiliations

  1. Physikalisches Institut, Rheinisch-Westfälische Technische Hochschule Aachen, Templergraben 64, D-5100, Aachen, Germany

    S. Ewert, P. Plein & U. Roll

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  1. S. Ewert
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  2. P. Plein
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  3. U. Roll
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Ewert, S., Plein, P. & Roll, U. Tunneling experiments on amorphous and crystalline superconducting tantalum films. Z. Physik B - Condensed Matter 47, 27–30 (1982). https://doi.org/10.1007/BF01686179

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