RSS feeds
РусскийEnglish
Issue 9, 2026
Volume year page
Issues Authors PACS Subscription For authors

Issues

 / 

2020

 / 

November

←  →

Reviews of topical problems


Spectroscopy of electron—phonon interaction of superconducting point contacts: experimental aspects


B.Verkin Institute for Low Temperature Physics and Engineering, National Academy of Sciences of Ukraine, prosp. Lenina 47, Kharkov, 61103, Ukraine

The recovering procedure of the electron—phonon interaction (EPI) functions from the additional nonlinearities of the current-voltage curve (I—V curve) of point contacts associated with an excess current is considered. The approach proposed takes into account both inelastic scattering, which causes suppression of the excess current in the reabsorption of nonequilibrium phonons by electrons undergoing Andreev reflection (Andreev electrons), and elastic processes associated with the electron—phonon renormalization of the energy spectrum in a superconductor. The results obtained are systematically expounded for both the ballistic contacts, wherein the second derivatives of the I—V curve in the normal state are proportional to the EPI functions, and inhomogeneous contacts (with dirty constrictions and clean banks), whose second derivatives in the normal state are either free of phonon singularities or weakly pronounced.

Fulltext pdf (915 KB)
Fulltext is also available at DOI: 10.3367/UFNe.2019.11.038693
Keywords: Yanson point-contact spectroscopy, electron—phonon coupling, superconductivity, energy gap, excess current
PACS: 73.40.Jn, 74.25.Kc, 74.45.+c, 74.50.+r (all)
DOI: 10.3367/UFNe.2019.11.038693
URL: https://ufn.ru/en/articles/2020/11/b/
000613920600002
2-s2.0-85101554394
2020PhyU...63.1072B
Citation: Bobrov N L "Spectroscopy of electron—phonon interaction of superconducting point contacts: experimental aspects" Phys. Usp. 63 1072–1091 (2020)
BibTexBibNote ® (generic)BibNote ® (RIS)MedlineRefWorks

Received: 7th, August 2019, revised: 23rd, October 2019, 11th, November 2019

Оригинал: Бобров Н Л «Спектроскопия электрон-фононного взаимодействия сверхпроводящих микроконтактов: экспериментальные аспекты» УФН 190 1143–1163 (2020); DOI: 10.3367/UFNr.2019.11.038693

References (40) ↓ Cited by (4) Similar articles (20)

  1. Ya’?с’?’? ’R ’F Zh. Eksp. Teor. Fiz. 66 1035 (1974); Yanson I K Sov. Phys. JETP 39 506 (1974)
  2. ’Fу’?’?’? ’R ’d, ’d’?’?’?ьya’?chу’? ’B ’v, Sh’?khт’?р ’i ’R ’s’v’n 3 1543 (1977); Kulik I O, Omel’yanchuk A N, Shekhter R I Sov. J. Low Temp. Phys. 3 740 (1977)
  3. Ya’?с’?’? ’R ’F, Kh’?т’?’?’?’?ch ’B ’E ’Bт’?’?с ’?’?’?р’?’?’?’?т’?’?т’?ыkh с’?’?’?тр’?’? э’?’?’?тр’?’?-ф’?’?’?’?’?’?’?’? ’?’?’?’?’?’?’?’?’?ст’?’?ya ’? ’?’?т’?’?’?’?kh (’F’?’?’?: ’v’?у’?’?’?’? ’?у’?’?’?, 1986); ’z’?р. ’?’? ’?’?’?’?. ya’?., Khotkevich A V, Yanson I K Atlas Of Point Contact Spectra Of Electron-Phonon Interactions In Metals (Dordrecht: Kluwer Acad. Publ., 1995)
  4. Naidyuk Yu G, Yanson I K Point-Contact Spectroscopy (New York: Springer, 2005)
  5. Kh’?ус ’E ’B, ’d’?’?’?ьya’?chу’? ’B ’v ’s’v’n 9 373 (1983); Khlus V A, Omel’yanchuk A N Sov. J. Low Temp. Phys. 9 189 (1983)
  6. Kh’?ус ’E ’B ’s’v’n 9 985 (1983); Khlus A V Sov. J. Low Temp. Phys. 9 510 (1983)
  7. ’d’?’?’?ьya’?chу’? ’B ’v, ’G’?’?’?’?’?р’?’?ь’?’? ’l ’R, ’Fу’?’?’? ’R ’d ’s’v’n 14 1142 (1988); Omel’yanchuk A N, Beloborod’ko S I, Kulik I O Sov. J. Low Temp. Phys. 14 630 (1988)
  8. Ya’?с’?’? ’R ’F, ’F’?’?’?рchу’? ’I ’E, Kh’?т’?’?’?’?ch ’B ’E ’s’v’n 10 423 (1984); Yanson I K, Kamarchuk G V, Khotkevich A V Sov. J. Low Temp. Phys. 10 220 (1984)
  9. ’F’?’?’?рchу’? ’I ’E, Kh’?т’?’?’?’?ch ’B ’E ’s’v’n 13 1275 (1987); Kamarchuk G V, Khotkevich A V Sov. J. Low Temp. Phys 13 717 (1987)
  10. Kh’?т’?’?’?’?ch ’B ’E ’? ’?р ’s’v’n 16 1199 (1990); Khotkevich A V et al Sov. J. Low Temp. Phys. 16 693 (1990)
  11. ’F’?’?’?рchу’? ’I ’E, Kh’?т’?’?’?’?ch ’B ’E, Ya’?с’?’? ’R ’F Fiz. Tverd. Tela 28 455 (1986); Kamarchuk G V, Khotkevich A V, Yanson I K Sov. Phys. Solid State 28 254 (1986)
  12. ’F’?’?’?рchу’? ’I ’E, Kh’?т’?’?’?’?ch ’B ’E, Ya’?с’?’? ’R ’F ’s’v’n 12 95 (1986); Kamarchuk G V, Khotkevich A V, Yanson I K Sov. J. Low Temp. Phys. 12 55 (1986)
  13. Ya’?с’?’? ’R ’F ’? ’?р ’s’v’n 13 1123 (1987); Yanson I K et al Sov. J. Low Temp. Phys. 13 635 (1987); Yanson I K et al arXiv:1512.03917
  14. Ya’?с’?’? ’R ’F ’? ’?р ’s’v’n 12 552 (1986); Yanson I K et al Sov. J. Low Temp. Phys. 12 313 (1986); Yanson I K et al arXiv:1512.00684
  15. Ya’?с’?’? ’R ’F ’? ’?р ’z’?сь’?’? Zh’e’n’s 45 425 (1987); Yanson I K et al JETP Lett. 45 543 (1987); Yanson I K et al arXiv:1602.04356
  16. ’G’?’?р’?’? ’v ’’ ’? ’?р ’s’v’n 11 925 (1985); Bobrov N L et al Sov. J. Low Temp. Phys. 11 510 (1985); Bobrov N L et al arXiv:1603.02598
  17. ’G’?’?р’?’? ’v ’’ ’? ’?р ’s’v’n 38 480 (2012); Bobrov N L et al Low. Temp. Phys. 38 373 (2012)
  18. ’G’?’?р’?’? ’v ’’ ’? ’?р ’s’v’n 40 280 (2014); Bobrov N L et al Low Temp. Phys. 40 215 (2014)
  19. Khotkevich ’B V, Khotkevych V V, Krasnyi O S ’Eiс’?. Kh’?р’?i’?сь’?’?’?’? ’?’?ts. у’?i’?. I’?. ’E.’v. ’F’?р’?’?i’?’?. ’l’?р. ’si’?’?’?’? (21) 27 (2014)
  20. McMillan W L, Rowell J M Phys. Rev. Lett. 14 108 (1965)
  21. Ya’?с’?’? ’R ’F ’?р. "Ya’?’?’?’?’?’? ’?’?р’?р’?с’?р’?’?’?’?’?’?’?ya э’?’?р’?’?’? ’?’?с’?т’?’?’?’? ’?’?рya’?’? ’? ’?’?т’?’?’?’?ch’?с’?’?kh ’?’?’?р’?’?’?’?т’?’?т’?kh ’?р’? ’?’?’?’?’?kh т’?’?’?’?р’?тур’?kh" ’K’?’?’?’?’? 328 (’a.: ’E’v’R’R’z’R, 1986); Ya’?с’?’? ’R ’F ’dт’?рыт’?ya. ’R’?’?’?р’?т. (40) 3 (1987)
  22. ’G’?’?р’?’? ’v ’’ ’s’v’n 45 562 (2019); Bobrov N L Low Temp. Phys. 45 482 (2019)
  23. ’Fу’?’?’? ’R ’d, Sh’?khт’?р ’i ’R, Sh’?’?р’?’?т’?’? ’B ’I Zh. Eksp. Teor. Fiz. 81 2126 (1981); Kulik I O, Shekhter R I, Shkorbatov A G Sov. Phys. JETP 54 1130 (1981)
  24. Ya’?с’?’? ’R ’F ’? ’?р ’s’v’n 9 1155 (1983); Yanson I K et al Sov. J. Low Temp. Phys. 9 596 (1983); Yanson I K et al arXiv:1604.07067
  25. Yanson I K et al Solid State Commun. 50 515 (1984)
  26. Kh’?т’?’?’?’?ch ’E ’E ’? ’?р ’Eiс’?. Kh’?р’?i’?сь’?’?’?’? ’?’?ts. у’?i’?. I’?. ’E.’v. ’F’?р’?’?i’?’?. ’l’?р. ’si’?’?’?’? (4) 96 (2000)
  27. ’G’?’?р’?’? ’v ’’ ’? ’?р ’s’v’n 42 1035 (2016); Bobrov N L et al Low Temp. Phys. 42 811 (2016)
  28. Wolf E L et al J. Low Temp. Phys. 40 19 (1980)
  29. ’z’?’?’?’?’?р’?’? Ya ’I ’? ’?р ’z’?сь’?’? Zh’e’n’s 79 597 (2004); Ponomarev Ya G et al JETP Lett. 79 484 (2004)
  30. Ekino T et al Phys. Rev. B 67 094504 (2003)
  31. Takasaki T et al Physica C 378-381 229 (2002)
  32. Yanson I K et al Phys. Rev. B 67 024517 (2003)
  33. Yanson I K et al Mod. Phys. Lett. B 17 657 (2003)
  34. Bobrov N L et al New Trends Superconductivity (NATO Science Series. Ser. II) Vol. 67 (Eds J F Annett, S Kruchinin) (Dordrecht: Kluwer Academic Publ., 2001) p. 225; Bobrov N L et al cond-mat/0110006
  35. Kim H-J et al Phys. Rev. Lett. 87 087002 (2001)
  36. Edwards J, Frindt R F J. Phys. Chem. Solids 32 2217 (1971)
  37. ’G’?’?р’?’? ’v ’’ ’s’v’n 41 768 (2015); Bobrov N L Low Temp. Phys. 41 595 (2015)
  38. Rowell J M, McMillan W L, Dynes R C Preprint Bell Labs (Murray Hill, NJ: Bell Labs, 1973) p. 83
  39. ’K’?’?’?’? ’B ’E, Kh’?ус ’E ’B Fiz. Tverd. Tela 32 3494 (1990); Demin A V, Khlus B A Sov. Phys. Solid State 32 2026 (1990)
  40. Ya’?с’?’? ’R ’F ’? ’?р ’s’v’n 14 1157 (1988); Yanson I K et al Sov. J. Low Temp. Phys. 14 639 (1988); Yanson I K et al arXiv:1512.06416
© 1918–2026 Uspekhi Fizicheskikh Nauk
Email: ufn@ufn.ru Editorial office contacts About the journal Terms and conditions