Skip to main content
SpringerLink
Log in

The Josephson Effect in PbIn/Fe1 –ySe1 –xTex Point Contacts: Probing the Order Parameter Symmetry

  • ORDER, DISORDER, AND PHASE TRANSITION IN CONDENSED SYSTEM
  • Published:
Journal of Experimental and Theoretical Physics Aims and scope Submit manuscript

Abstract

Characteristics of the Josephson effect in Pb0.6In0.4/FeSe0.4Te0.6 point contacts with the current flowing parallel to ab plane of the iron chalcogenide crystal (with critical temperature Tc ≈ 15 K) have been studied. Dependences of the critical current Ic and amplitudes In of the first steps of current (Shapiro steps) in the current–voltage (I–V) characteristics (n = 0, 1, 2; I0 = Ic) on the microwave power P (at frequency f = 7.6 GHz) and dependences of the characteristic voltage Vc(T) = IcRN (RN being the normal state resistance) on the temperature T have been measured. It is found that the characteristics of contacts (Ic, RN, Vc) obtained for initial parts of the I–V curves do not adequately describe the oscillations of current steps in the microwave radiation field. A method is proposed for determining the normalized microwave frequency Ω = 2πf(2eVc/\(\hbar \))–1 that provides quantitative description of the current oscillation steps in the framework of a resistive contact model and allows one to check that the Josephson superconducting current Is is proportional to sin(aφ) (a = 1, 2), where φ is the phase difference of the order parameters. Comparison of the measured In(\(\sqrt P \)) curves to those calculated using the resistive model showed that Is = Icsinφ, in agreement with the conventional s and s++ symmetry of the order parameter in FeSe0.4Te0.6. It is established that Vc of the contacts studied is proportional to T in a wide temperature interval.

This is a preview of subscription content, log in via an institution to check access.

Access this article

Log in via an institution

Price excludes VAT (USA)
Tax calculation will be finalised during checkout.

Instant access to the full article PDF.

Institutional subscriptions

Fig. 1.
Fig. 2
Fig. 3.
Fig. 4.
Fig. 5
Fig. 6.
Fig. 7.

Similar content being viewed by others

REFERENCES

  1. Y. Kamihara, T. Watanabe, M. Hirano, et al., J. Am. Chem. Soc. 130, 3296 (2008).

    Article  Google Scholar 

  2. P. M. Aswathy, J. B. Anooja, P. M. Sarun, et al., Supercond. Sci. Technol. 23, 073001 (2010).

    Article  ADS  Google Scholar 

  3. Y. J. Uemura, Nat. Mater. 8, 253 (2009).

    Article  ADS  Google Scholar 

  4. H. Ding, P. Richard, K. Nakayama, et al., Europhys. Lett. 83, 47001 (2008).

    Article  ADS  Google Scholar 

  5. C. Wang, L. Li, S. Chi, et al., Europhys. Lett. 83, 67006 (2008).

    Article  ADS  Google Scholar 

  6. I. I. Mazin, D. J. Singh, M. D. Johannes, et al., Phys. Rev. Lett. 101, 057003 (2008).

    Article  ADS  Google Scholar 

  7. M. M. Korshunov, Phys. Usp. 57, 813 (2014).

    Article  ADS  Google Scholar 

  8. N. Hao and J. Hu, Phys. Rev. X 4, 031053 (2014).

    Google Scholar 

  9. K.-W. Yeh, T.-W. Huang, Y.-L. Huang, et al., Europhys. Lett. 84, 37002 (2008).

    Article  ADS  Google Scholar 

  10. M. H. Fang, H. M. Pham, B. Qian, et al., Phys. Rev. B 78, 224503 (2008).

    Article  ADS  Google Scholar 

  11. B. C. Sales, A. S. Sefat, M. A. McGuire, et al., Phys. Rev. B 79, 094521 (2009).

    Article  ADS  Google Scholar 

  12. P. Zhang, K. Yaji, T. Hashimoto, et al., Science (Washington, DC, U. S.) 360, 182 (2018).

    Article  ADS  Google Scholar 

  13. D. Wang, L. Kong, P. Fan, et al., Science (Washington, DC, U. S.) 362, 333 (2018).

    Article  ADS  Google Scholar 

  14. Y. Sun, T. Taen, T. Yamada, et al., Supercond. Sci. Technol. 28, 044002 (2015).

    Article  ADS  Google Scholar 

  15. A. Barone and G. Paterno, Physics and Applications of the Josephson Effect (Wiley, New York, 1982).

    Book  Google Scholar 

  16. A. I. Buzdin, L. N. Bulaevskii, and S. V. Panyukov, JETP Lett. 35, 178 (1982).

    ADS  Google Scholar 

  17. Y. Tanaka and S. Kashiwaya, Phys. Rev. B 56, 892 (1997).

    Article  ADS  Google Scholar 

  18. D. J. van Harlingen, Rev. Mod. Phys. 67, 515 (1995).

    Article  ADS  Google Scholar 

  19. I. B. Sperstad, J. Linder, and A. Sudbo[slash], Phys. Rev. B 80, 144507 (2009).

    Article  ADS  Google Scholar 

  20. A. Yamakage, M. Sato, K. Yada, et al., Phys. Rev. B 87, 100510(R) (2013).

  21. Y. Yerin and A. N. Omelyanchouk, arXiv:cond-mat/1712.00767.

  22. P. Seidel, Supercond. Sci. Technol. 24, 043001 (2011).

    Article  ADS  Google Scholar 

  23. S. Schmidt, S. Doring, N. Hasan, et al., Phys. Status Solidi B 254, 1600165 (2017).

    Article  ADS  Google Scholar 

  24. V. V. Fisun, O. P. Balkashin, O. E. Kvitnitskaya, I. A. Korovkin, and N. V. Gamayunova, J. Low Temp. Phys. 40, 919 (2014).

    Article  Google Scholar 

  25. A. A. Golubov, M. Yu. Kupriyanov, and E. Il’ichev, Rev. Mod. Phys. 76, 411 (2004).

    Article  ADS  Google Scholar 

  26. A. V. Burmistrova, A. Devyatov, A. A. Golubov, et al., Phys. Rev. B 91, 214501 (2015).

    Article  ADS  Google Scholar 

  27. M. Tortello, V. A. Stepanov, X. Ding, et al., J. Supercond. Novel Magn. 28, 679 (2016).

    Article  Google Scholar 

  28. S. I. Vedeneev, M. V. Golubkov, Yu. I. Gorina, V. V. Rodin, A. V. Sadakov, N. N. Sentyurina, O. A. Sobolevskii, V. A. Stepanov and S. G. Chernook, J. Exp. Theor. Phys. 127, 721 (2018).

    Article  ADS  Google Scholar 

  29. M. V. Golubkov, Yu. I. Gorina, V. V. Rodin, N. N. Sentjurina, V. A. Stepanov, and S. G. Chernook, Crystallogr. Rep. 64, 991 (2019).

    Article  ADS  Google Scholar 

  30. P. Russer, J. Appl. Phys. 43, 2008 (1972).

    Article  ADS  Google Scholar 

  31. https://en.wikibooks.org/wiki/Python_Programming.

  32. F. Busse, R. Nebel, P. Herzog, et al., Appl. Phys. Lett. 63, 1687 (1993).

    Article  ADS  Google Scholar 

  33. K. K. Likharev, Rev. Mod. Phys. 51, 101 (1979).

    Article  ADS  Google Scholar 

  34. H. Miao, P. Richard, Y. Tanaka, et al., Phys. Rev. B 85, 094506 (2012).

    Article  ADS  Google Scholar 

  35. S. Schmidt, S. Döring, F. Schmidl, et al., Appl. Phys. Lett. 97, 172504 (2010).

    Article  ADS  Google Scholar 

  36. L. G. Aslamazov and A. I. Larkin, JETP Lett. 9, 87 (1969).

    ADS  Google Scholar 

  37. Y. Ota, N. Nakai, H. Nakamura, et al., Phys. Rev. B 81, 214511 (2010).

    Article  ADS  Google Scholar 

  38. D. F. Agterberg, E. Demler, and B. Janko, Phys. Rev. B 66, 214507 (2002).

    Article  ADS  Google Scholar 

  39. X. Zhang, Y. S. Oh, Y. Liu, et al., Phys. Rev. Lett. 102, 147002 (2009).

    Article  ADS  Google Scholar 

  40. I. B. Sperstad, J. Linder, and A. Sudbo[slash], Phys. Rev. B 80, 144507 (2009).

    Article  ADS  Google Scholar 

  41. Z. Huang and X. Hu, Appl. Phys. Lett. 104, 162602 (2014).

    Article  ADS  Google Scholar 

  42. Y. Ota, M. Machida, and T. Koyama, Phys. Rev. B 82, 140509 (2010).

    Article  ADS  Google Scholar 

  43. R. L. Kautz, R. H. Ono, and C. D. Reintsema, Appl. Phys. Lett. 61, 342 (1992).

    Article  ADS  Google Scholar 

  44. P. Seidel, M. Seigel, and E. Heinz, Phys. C (Amsterdam, Neth.) 180, 284 (1991).

  45. K. K. Likharev and V. K. Semenov, Radiotekh. Elektron. 16, 2367 (1971).

    Google Scholar 

Download references

ACKNOWLEDGMENTS

The authors are grateful to laboratory colleagues for kindly providing FeSe0.4Te0.6 crystal sample and to S.I. Vedeneev for fruitful discussions.

Funding

The study was supported in part by the Program of Fundamental Investigations of the Presidium of the Russian Academy of Sciences in the part of “Topical Problems of Low-Temperature Physics.”

Author information

Authors and Affiliations

  1. Lebedev Physical Institute, Russian Academy of Sciences, 119333, Moscow, Russia

    V. A. Stepanov & M. V. Golubkov

Authors
  1. V. A. Stepanov
    View author publications

    You can also search for this author in PubMed Google Scholar

  2. M. V. Golubkov
    View author publications

    You can also search for this author in PubMed Google Scholar

Corresponding author

Correspondence to V. A. Stepanov.

Additional information

Translated by P. Pozdeev

Rights and permissions

Reprints and permissions

About this article

Check for updates. Verify currency and authenticity via CrossMark

Cite this article

Stepanov, V.A., Golubkov, M.V. The Josephson Effect in PbIn/Fe1 –ySe1 –xTex Point Contacts: Probing the Order Parameter Symmetry. J. Exp. Theor. Phys. 130, 204–213 (2020). https://doi.org/10.1134/S1063776120020156

Download citation

  • Received:

  • Revised:

  • Accepted:

  • Published:

  • Issue Date:

  • DOI: https://doi.org/10.1134/S1063776120020156

Search

Navigation