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Superconductors with crystalline-field-split impurities: Tunneling density of states

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Abstract

We compute the tunneling density of states for superconductors containing rare earth impurities with crystal-field-split energy levels. It is shown in detail how the different energy levels show up in the density of states. For the case of a singlet ground state it is demonstrated that the density of states curve is of the BCS type instead of the broadened Abrikosov—Gorkov type even if the pair-breaking effect of the impurities is strong enough to lower the superconducting transition temperature considerably. We have also calculated the tunneling conductance in order to facilitate a comparison between theory and possible experiments.

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References

  1. 1.

    P. Fulde, L. L. Hirst, and A. Luther,Z. Physik 230, 155 (1970); J. Keller and P. Fulde,J. Low Temp. Phys. 4, 289 (1971); J. Keller and P. Fulde,J. Low Temp. Phys. 12, 63 (1973).

  2. 2.

    A. A. Abrikosov and L. P. Gor'kov,Zh. Eksperim. i Teor. Fiz. 38, 1781 (1960) [English Transl.:Soviet Phys.-JETP 12, 1243 (1961)].

  3. 3.

    E. Bucher, K. Andres, J. P. Maita, and G. W. Hull Jr.,Helv. Phys. Acta 41, 723 (1968).

  4. 4.

    S. Skalski, O. Betbeder-Matibet, and P. R. Weiss,Phys. Rev. 136, A1500 (1964).

  5. 5.

    J. R. Schrieffer,Theory of Superconductivity (Benjamin, New York, 1964), p. 188.

  6. 6.

    P. Fulde, inTunneling Phenomena in Solids (Plenum Press, New York, 1969), Chapter 29.

  7. 7.

    U. Brandt,J. Low Temp. Phys. 2, 573 (1970).

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Holzer, P., Keller, J. & Fulde, P. Superconductors with crystalline-field-split impurities: Tunneling density of states. J Low Temp Phys 14, 247–256 (1974). https://doi.org/10.1007/BF00655332

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Keywords

  • Transition Temperature
  • Energy Level
  • Rare Earth
  • Magnetic Material
  • Superconducting Transition Temperature