Hostname: page-component-78c5997874-ndw9j Total loading time: 0 Render date: 2024-11-17T14:53:06.770Z Has data issue: false hasContentIssue false
  • English
  • Français

Evidence for Phonon-Mediated Coupling in Superconducting Ba0.6K0.4BiO3

Published online by Cambridge University Press:  21 February 2011

D. G. Hinks ,
B. Dabrowski ,
D. R. Richards ,
J. D. Jorgensen ,
Shiyou Pei  and
J. F. Zasadzinski
D. G. Hinks
Affiliation:
Argonne National Laboratory, Materials Science Division, Argonne IL 60439
B. Dabrowski
Affiliation:
Argonne National Laboratory, Materials Science Division, Argonne IL 60439
D. R. Richards
Affiliation:
Argonne National Laboratory, Materials Science Division, Argonne IL 60439
J. D. Jorgensen
Affiliation:
Argonne National Laboratory, Materials Science Division, Argonne IL 60439
Shiyou Pei
Affiliation:
Argonne National Laboratory, Materials Science Division, Argonne IL 60439
J. F. Zasadzinski
Affiliation:
Illinois Institute of Technology, Physics Department, Chicago IL 60616
Get access

Abstract

Superconducting Ba0.6K0.4BiO3, with a Tc of 30K, shows a large 18O isotope effect which indicates that phonons are involved in the pairing mechanism. Infrared reflectivity measurements indicate a value for the superconducting gap consistent with moderate coupling (2Δ/kTc = 3.5 ± 0.5). A mediating energy for pairing of about 40 meV would be required to obtain a Tc of 30K. Strong coupling of electrons by optical phonons (which are present in this material with energies up to 80 meV) could account for the observed transition temperature. Recent tunneling spectroscopy shows the presence of strongly coupled optical phonons in the 40 to 70 meV region, indicating that superconductivity in this material may be phonon mediated.

Type
Research Article
Information
MRS Online Proceedings Library (OPL) , Volume 156: Symposium M – High Temperature Superconductors: Relationships Between Properties, Structure, and Solid State Chemistry , 1989 , 357
Copyright
Copyright © Materials Research Society 1989

Access options

Get access to the full version of this content by using one of the access options below. (Log in options will check for institutional or personal access. Content may require purchase if you do not have access.)

References

REFERENCES

1. Mattheiss, L.R.,Gyorgy, E.M., and Johnson, D.W. Jr., Phys.Rev. B 37, 3745 (1988).Google Scholar
2. Cava, R.J., Batlogg, B., Krajewski, J.J., Farrow, R., Rupp, L.W. Jr., White, A.E., Short, K., Peck, W.F., and Kometani, T., Nature 332 814 (1988).Google Scholar
3. Hinks, D.G., Dabrowski, B., Jorgensen, J.D., Mitchell, A.W., Richards, D.R., Pei, Shiyou, and Shi, Donglu, Nature 333, 836 (1988).Google Scholar
4. Hinks, D.G., Mitchell, A.W., Zheng, Y., Richards, D.R. and Dabrowski, B., Appl. Phys. Lett. 54, 1585 (1989).Google Scholar
5. Cox, D.E. and Sleight, A.W., Acta Cryst. B35, 1–10 (1979).Google Scholar
6. Wignacourt, J.P., Swinnea, J.S., Steinfink, H. and Goodenough, J.B., Appl. Phys. Lett. 53, 1753 (1988).Google Scholar
7. Schneemeyer, L.F., Thomas, J.K., Seigrist, T., Batlogg, B., Rupp, L.W., Opila, R.L., Cava, R.J. and Murphy, D.W., Nature 335, 421 (1988).Google Scholar
8. Batlogg, B., Cava, R.J., Rupp, L.W. Jr., Mujsce, A.M., Remeika, J.P., Peck, W. F. Jr., Cooper, A.S. and Espinosa, G.P., Phys. Rev. Lett. 61, 1670 (1988).Google Scholar
9. Hinks, D.G., Richards, D.R., Dabrowski, B., Marx, D.T. and Mitchell, A.W., Nature 335, 419 (1988).Google Scholar
10. Kondoh, S., Sera, M., Ando, Y. and Sato, M., Physica C 157, 469 (1989).Google Scholar
11. Welp, U., Kwok, W.K., Crabtree, G.W., Claus, H., Vandervoort, K.G., Dabrowski, B., Mitchell, A.W., Richards, D.R., Marx, D.T. and Hinks, D.G., Physica C 156, 27 (1988).Google Scholar
12. Marsiglio, F., Akis, R. and Carbotte, J.P., Phys. Rev. B 36, 5245 (1987). F. Marsiglio, Ph.D. thesis, MacMaster University (1988).Google Scholar
13. Schlesinger, Z., Collins, R.T., Calise, J.A., Hinks, D.G., Mitchell, A.W., Zheng, Y., Dabrowski, B., Bickers, N.E. and Scalapino, D.J., Phys. Rev. B, submittedGoogle Scholar
14. Loong, C.-K., Vashishta, P., Kalia, R.K., Degani, M.H., Price, D.L., Jorgensen, J.D., Hinks, D.G., Dabrowski, B., Mitchell, A.W., Richards, D.R. and Zheng, Y., Phys.Rev.B, submitted.Google Scholar
15. Zasadzinski, J.F., Tralshawala, N., Hinks, D.G., Dabrowski, B., Mitchell, A.W., Richards, D.R., Physica C to be published (May 1989).Google Scholar
16. McCarty, K.F., Radousky, H.B., Hinks, D.G., Zheng, Y., Mitchell, A.W., Folkerts, T.J. and Shelton, R.N., Phys. Rev.B., submitted.Google Scholar
17. Ruf, T., Thomsen, C., Liu, R. and Cardona, M., Phys. Rev.B 38, 11985 (1988).Google Scholar
18. Machida, K., Physica C 156, 276 (1988).Google Scholar
19. Mattheiss, L.F. and Harmann, D.R., Phys.Rev.B 28, 4227 (1983).Google Scholar
20. Sato, H., Tajima, S., Takagi, H. and Uchida, S., Nature 338, 241 (1989).Google Scholar
21. Mattheiss, L.F. and Harmann, D.R., Phys. Rev. Lett. 60, 2681 (1988).Google Scholar