Advertisement

The Role of In-plane Oxygens in Optimally Doped NCCO

  • D. K. Sunko
  • S. Barišić
Article
  • 61 Downloads

Abstract

Within the framework of the three-band Hubbard (Emery) model of high-temperature superconductors, we find a new physical regime for the electron-doped compound NCCO at optimal doping. It is characterized by a strong renormalization of the bare copper–oxygen hopping, similar to the one on the hole-doped side, and a low value of the effective copper–oxygen splitting. After a zeroth order fit of the Fermi surface is achieved, ARPES data are reproduced by adding a simple phenomenological weak-coupling antiferromagnetic perturbation of the conduction electrons. The experimental situation corresponds to a pseudogap across the whole Fermi surface. The wide dispersive features in NCCO ARPES spectra are analogous to the hump in BSCCO. The oxygen degree of freedom dominates the band structure of both NCCO and BSCCO, however, in NCCO this cannot be demonstrated without simultaneously accounting for the antiferromagnetic scattering. The difference in T c of the two compounds may be related in part to the difference in the calculated densities of states.

Keywords

Emery model Magnetic fluctuations Electron-doped superconductors 

Preview

Unable to display preview. Download preview PDF.

Unable to display preview. Download preview PDF.

References

  1. 1.
    Kastner, M., Birgenau, R., Shirane, G., Endoh, Y.: Rev. Mod. Phys. 70, 897 (1998) CrossRefADSGoogle Scholar
  2. 2.
    Takagi, H., Batlogg, B., Kao, H.L., Kwo, J., Cava, R.J., Krajewski, J.J., Peck, J.W.F.: Phys. Rev. Lett. 69, 2975 (1992) CrossRefADSGoogle Scholar
  3. 3.
    Emery, V.J.: Phys. Rev. Lett. 58, 2794 (1987) CrossRefADSGoogle Scholar
  4. 4.
    Varma, C.M., Schmitt-Rink, S., Abrahams, E.: Solid State Commun. 62, 681 (1987) CrossRefGoogle Scholar
  5. 5.
    de Melo, C.A.R.S., Doniach, S.: Phys. Rev. B 41, 6633 (1990) CrossRefADSGoogle Scholar
  6. 6.
    Si, Q., Zha, Y., Levin, K.: Phys. Rev. B 47, 9055 (1993) CrossRefADSGoogle Scholar
  7. 7.
    Kuroki, K., Arita, R., Aoki, H.: J. Low Temp. Phys. 117, 247 (1999) CrossRefGoogle Scholar
  8. 8.
    Kusko, C., Markiewicz, R.S., Lindroos, M., Bansil, A.: Phys. Rev. B 66, 140513 (2002) CrossRefADSGoogle Scholar
  9. 9.
    Kyung, B., Hankevych, V., Dar, A.-M., Tremblay, A.-M.S.: Phys. Rev. Lett. 93, 147004 (2004) CrossRefADSGoogle Scholar
  10. 10.
    Eschrig, M., Norman, M.R.: Phys. Rev. B 67, 144503/23 (2003) CrossRefADSGoogle Scholar
  11. 11.
    Zhang, F.C., Rice, T.M.: Phys. Rev. B 37, 3759 (1988) CrossRefADSGoogle Scholar
  12. 12.
    Mrkonjić, I., Barišić, S.: Eur. Phys. J. B 34, 69 (2003) CrossRefADSGoogle Scholar
  13. 13.
    Sunko, D.K., Barišić, S.: Phys. Rev. B(RC) (2007, to appear), cond-mat/0607482 Google Scholar
  14. 14.
    Sunko, D.K., Barišić, S.: Eur. Phys. J. B 46, 269 (2005) CrossRefADSGoogle Scholar
  15. 15.
    Campuzano, J.C., Ding, H., Norman, M.R., Fretwell, H.M., Randeria, M., Kaminski, A., Mesot, J., Takeuchi, T., Sato, T., Yokoya, T., et al.: Phys. Rev. Lett. 83, 3709 (1999) CrossRefADSGoogle Scholar
  16. 16.
    Fedorov, A.V., Valla, T., Johnson, P.D., Li, Q., Gu, G.D., Koshizuka, N.: Phys. Rev. Lett. 82, 2179 (1999) CrossRefADSGoogle Scholar
  17. 17.
    Armitage, N.P., Lu, D.H., Feng, D.L., Kim, C., Damascelli, A., Shen, K.M., Ronning, F., Shen, Z.-X., Onose, Y., Taguchi, Y., et al.: Phys. Rev. Lett. 86, 1126 (2001) CrossRefADSGoogle Scholar
  18. 18.
    Onose, Y., Taguchi, Y., Ishizaka, K., Tokura, Y.: Phys. Rev. Lett. 87, 217001 (2001) CrossRefADSGoogle Scholar
  19. 19.
    Armitage, N.P., Lu, D.H., Kim, C., Damascelli, A., Shen, K.M., Ronning, F., Feng, D.L., Bogdanov, P., Shen, Z.-X., Onose, Y., et al.: Phys. Rev. Lett. 87, 147003 (2001) CrossRefADSGoogle Scholar
  20. 20.
    Sato, T., Kamiyama, T., Takahashi, T., Kurahashi, K., Yamada, K.: Science 291, 1517 (2001) CrossRefADSGoogle Scholar
  21. 21.
    Uefuji, T., Kubo, T., Yamada, K., Fujita, M., Kurahashi, K., Watanabe, I., Nagamine, K.: Physica C 357–360, 208 (2001) CrossRefGoogle Scholar
  22. 22.
    Yamada, K., Kurahashi, K., Endoh, Y., Birgeneau, R.J., Shirane, G.: J. Phys. Chem. Solids 60, 1025 (1999) CrossRefADSGoogle Scholar
  23. 23.
    Motoyama, E.M., Yu, G., Vishik, I.M., Vajk, O.P., Mang, P.K., Greven, M.: cond-mat/0609386 (2006) Google Scholar
  24. 24.
    Qazilbash, M.M., Koitzsch, A., Dennis, B.S., Gozar, A., Balci, H., Kendziora, C.A., Greene, R.L., Blumberg, G.: Phys. Rev. B 72, 214510 (2005) CrossRefADSGoogle Scholar
  25. 25.
    Lanzara, A., Bogdanov, P.V., Zhou, X.J., Kellar, S.A., Feng, D.L., Lu, E.D., Yoshida, T., Eisaki, H., Fujimori, A., Kishio, K., Shimoyama, J.-I., Noda, T., Uchida, S., Hussain, Z., Shen, Z.-X.: Nature 412, 510–514 (2001) CrossRefADSGoogle Scholar

Copyright information

© Springer Science+Business Media, LLC 2007

Authors and Affiliations

  1. 1.Department of Physics, Faculty of ScienceUniversity of ZagrebZagrebCroatia

Personalised recommendations