Abstract
The mechanisms of dielectric-to-metal and metal-to-superconductor phase transitions are proposed. The antiphase-ordered array of heavy holes localized on the apical oxygen-bismuth bonds creates a dielectric gap on the Fermi surfce. With doping by potassium, light carriers are introduced, which reduce the Coulomb potential of ordered heavy holes and dielectric gap. Heavy holes tunneling between the neighboring apical O−1 and O−2 ions produce local charge fluctuations. Their interactions with short-wavelength optical phonons yield the coupled tunneling-phonon modes. Those local boson modes lead to the pairing of light-conducting carriers and to superconductivity with a short coherence length. The local pairing may explain the observed upward curvature ofH c2(T) in the range fromT c =30 K down to 4 K and up to 16 T. After obvious rearrangements, the mechanism can be applied for all bismuth oxide-based and copper oxide-based superconductors.
Similar content being viewed by others
References
M. Verwerft, G. Van Tendeloo, D. G. Hinks, B. Dabrowski, D. R. Richards, A. W. Mitchell, D. T. Marx, S. Pei, and J. D. Jorgensen,Phys. Rev. B 44, 9547 (1991).
M. Licheron, N. Lissart, and F. Gervait,Solid State Commun. 79, 667 (1991).
Z. X. Shen, P. A. P. Lindberg, B. O. Wells, D. S. Dessau, A. Borg, I. Lindau, W. E. Spicer, W. P. Ellis, G. H. Kwei, K. C. Ott, J. S. Kang, and J. W. Allen,Phys. Rev. B 40, 6912 (1989).
S. M. Heald, D. DcMarsio, M. Croft, M. S. Hegde, S. Li, and M. Greenblatt,Phys. Rev. B 40, 8828 (1989).
N. V. Anshukova, V. B. Ginodman, A. I. Golovashkin, L. N. Tsherichina, L. I. Ivanova, V. P. Rusakov, and A. M. Tschovrebov,Zh. Eksp. Teor. Fiz. 97, 1635 (1990) [Sov. Phys. JETP 70, 923 (1990)].
G. Kh. Panova, A. A. Shikov, B. I. Savel'ev, A. P. Zhernov, N. V. Anshukova, A. I. Golovashkin, L. L. Ivanova, and A. P. Rusakov,Zh. Eksp. Teor. Fiz. 103, 605 (1993) [Sov. Phys. JETP 76, 302 (1993)].
R. Micnas, J. Ranninger, and S. Robaszkiewiez,Rev. Mod. Phys. 62, 113 (1990).
N. V. Anshukova, A. I. Golovashkin, L. I. Ivanova, and A. P. Rusakov,Progr. High Temp. Supercond. 32, 403 (1991).
N. V. Anshukova, A. I. Golovashkin, L. I. Ivanova, and A. P. Rusakov,Sverkhprovodimost' (KIAE),5, 644 (1992).
W. Markowitsch, H. Jodlbauer, V. Schlosser, W. Lang, K. Remschnig, and P. Rogl.Physica C 185–189, 993 (1991).
S. H. Blanton, T. R. Collins, K. H. Kelleher, L. D. Rotter, Z. Schlesinger, D. G. Hinks, and Y. Zheng,Phys. Rev. B 47, 996 (1993).
M. Tachiki and S. Takahashi,Phys. Rev. B 39, 293 (1989).
Author information
Authors and Affiliations
Rights and permissions
About this article
Cite this article
Anshukova, N.V., Golovashkin, A.I., Ivanova, L.I. et al. Phase transitions in the Ba1−x K x BiO3 system and other oxide superconductors. J Supercond 7, 423–425 (1994). https://doi.org/10.1007/BF00724581
Received:
Issue Date:
DOI: https://doi.org/10.1007/BF00724581