Abstract
The optical conductivity sum rule is used to examine the evolution of the spectral weight N(ω) in both the normal and superconducting states of optimally and underdoped YBa2Cu3O6+x along the a axis. Differences in N(ω) above and below T c allow the strength of the superconducting condensate ρs to be determined. In the optimally-doped material, ρs is fully formed at energies comparable to the full superconducting gap maximum (≃0.1 eV), while in the underdoped material the energy scale for convergence is considerably higher (≃0.6 eV). This difference is discussed in terms of normal-state properties.
This is a preview of subscription content, log in via an institution to check access.
Similar content being viewed by others
REFERENCES
D. Y. Smith, in Handbook of Optical Constants of Solids, E. D. Palik, ed. (Academic Press, New York, 1985), pp. 35–68.
R. A. Ferrell and R. E. Glover III, Phys. Rev. 109 1398 (1958).
M. Tinkham and R. A. Ferrell, Phys. Rev. Lett. 2 331 (1959).
M. Tinkham, Introduction to Superconductivity (McGraw-Hill, New York, 1966).
S. Charkravarty, Eur. Phys. J. B 5 337 (1998).
J. Hirsch, Physica C 199 305 (1992).
M. R. Norman, M. Randeria, B. Jankó, and J. C. Campuzano, Phys. Rev. B 61 14742 (2000).
R. Haslinger and A. V. Chubukov, Phys. Rev. B 67 140504 (2003).
P. A. Lee, Physica C 317 194 (1999).
P. W. Anderson, Physica C 341–348 9 (2000).
V. J. Emery and S. A. Kivelson, J. Phys. Chem. Solids 61 467 (2000).
S. Alexandrov and N. F. Mott, High Temperature Superconductors and Other Superfluids (Taylor and Francis, London, 1994).
C. C. Homes, D. A. Bonn, R. Liang, W. N. Hardy, D. N. Basov, T. Timusk, and B. P. Clayman, Phys. Rev. B 60 9782 (1999).
D. B. Tanner, H. L. Liu, M. A. Quijada, A. M. Zibold, H. Berger, R. J. Kelley, M. Onellion, F. C. Chou, D. C. Johnston, J. P. Rice, et al., Physica B 244 1 (1998).
D. B. Tanner and T. Timusk, in Physical Properties of High Temperature Superconductors III, D. M. Ginsberg, ed. (World Scientific, Singapore, 1992), p. 408.
A. V. Puchkov, D. N. Basov, and T. Timusk, J. Phys: Cond. Matt. 8 10049 (1996).
T. Timusk and B. Statt, Rep. Prog. Phys. 62 61 (1999).
D. N. Basov, E. J. Singley, and S. V. Dordevic, Phys. Rev. B 65 054516 (2002).
J. J. Tu, C. C. Homes, G. D. Gu, D. N. Basov, and M. Strongin, Phys. Rev. B 66 144514 (2002).
A. F. Santander-Syro, R. P. S. M. Lobo, N. Bontemps, Z. Konstantinovic, Z. Z. Li, and H. Raffy, Europhys. Lett. 62 568 (2003).
M. R. Norman and C. Pépin, Phys. Rev. B 66 100506 (2002).
Author information
Authors and Affiliations
Rights and permissions
About this article
Cite this article
Homes, C.C., Dordevic, S.V., Bonn, D.A. et al. Energy Scales in the High-T c Superconductor YBa2Cu3O6+x . Journal of Superconductivity 17, 93–96 (2004). https://doi.org/10.1023/B:JOSC.0000011848.79570.de
Issue Date:
DOI: https://doi.org/10.1023/B:JOSC.0000011848.79570.de