Current Noise in Metallic Contacts Based on Two-Gap Superconductors

E. S. Zhytlukhina$^{1,2}$

$^{1}$Donetsk Institute for Physics and Engineering Named after O. O. Galkin, NAS of Ukraine, 46 Nauky Ave., UA-03028 Kyiv, Ukraine
$^{2}$Vasyl’ Stus Donetsk National University, 21 600-richchya Str., UA-21021 Vinnytsia, Ukraine

Received: 15.02.2020; final version - 28.04.2020. Download: PDF

Current fluctuations in layered hybrid structures formed by a metal injector, a nanoscale insulator, a normal metal interlayer, and the superconductor are studied theoretically. As shown, the simultaneous measurements of shot noise and differential conductance in such samples can serve as a source of reliable information on the presence of two energy bands with different superconducting gaps in the superconductor.

Key words: two-band superconductors, current fluctuations, shot noise, differential conductance.



PACS: 05.60.Gg, 73.21.Ac, 73.63.Rt, 74.40.-n

Citation: E. S. Zhytlukhina, Current Noise in Metallic Contacts Based on Two-Gap Superconductors, Metallofiz. Noveishie Tekhnol., 42, No. 9: 1197—1206 (2020) (in Ukrainian)

  1. V. M. Svistunov, A. I. D'yachenko, and M. A. Belogolovskii, J. Low Temp. Phys., 31: 339 (1978). Crossref
  2. H. Suhl, B. T. Matthias, and L. R. Walker, Phys. Rev. Lett., 3: 552 (1959). Crossref
  3. V. A. Moskalenko, Fiz. Met. Metalloved., 8: 503 (1959) (in Russian).
  4. M. Cohen, G. Gladstone, M. Jensen, and J. Schrieffer, Sverkhprovodimost Poluprovodnikov i Perekhodnykh Metallov [Superconductivity of Semiconductors and Transition Metals] (Moscow: Mir: 1972) (in Russian).
  5. M. Ruby, B. W. Heinrich, J. I. Pascual, and K. J. Franke, Phys. Rev. Lett., 114: 157001 (2015). Crossref
  6. V. Tarenkov, A. Dyachenko, V. Krivoruchko, A. Shapovalov, and M. Belogolovskii, J. Supercond. Nov. Magn., 33: 569 (2020). Crossref
  7. M. V. Sadovskii, Phys. Usp., 51: 1201 (2008). Crossref
  8. M. M. Korshunov, Phys. Usp., 57: 813 (2014). Crossref
  9. A. J. Leggett, Progr. Theor. Phys., 36: 901 (1966). Crossref
  10. E. S. Zhitlukhina, V. V. Shamaev, and V. P. Bloshchytskyi, Metallofiz. Noveishie Tekhnol., 41, No. 9: 1143 (2019) (in Russian). Crossref
  11. V. E. Shaternik, A. P. Shapovalov, A. V. Suvorov, N. A. Skoryk, and M. A. Belogolovskii, Low Temp. Phys., 42: 426 (2016). Crossref
  12. D. Wu, B. Dolgin, G. Jung, V. Markovich, Y. Yuzhelevski, M. Belogolovskii, and Ya. M. Mukovskii, Appl. Phys. Lett., 90: 242110 (2007). Crossref
  13. Ya. M. Blanter and M. Buttiker, Phys. Rep., 336: 1 (2000). Crossref
  14. M. Belogolovskii, Proximity Effect in Applied Superconductivity. Handbook on Devices and Applications (Eds. P. Seidel) (Weinheim: Wiley-VCH: 2015), vol. 1, p. 49.
  15. M. Belogolovskii, E. Zhitlukhina, and O. Egorov, Low Temp. Phys., 42: 1063 (2016). Crossref
  16. V. Shaternik, M. Belogolovskii, T. Prikhna, A. Shapovalov, O. Prokopenko, D. Jabko, O. Kudrja, O. Suvorov, and V. Noskov, Physics Procedia, 36: 94 (2012). Crossref
  17. M. Belogolovskii, E. Zhitlukhina, V. Lacquaniti, N. De Leo, M. Fretto, and A. Sosso, Low Temp. Phys., 43: 756 (2017). Crossref