Preferences help
enabled [disable] Abstract
Number of results
2007 | 111 | 5 | 705-711
Article title

The Existence of the 60 K Plateau in the YBa_2Cu_3O_{6+y} Phase Diagram: the Role of Oxygen Ordering and Charge Imbalance

Title variants
Languages of publication
We propose a semi-microscopic model of YBa_2Cu_3O_{6+y} to investigate the origin of the 60 K plateau in its phase diagram. Our model is a "phase only" approach to the high-temperature superconducting system in terms of collective variables. It is able to capture characteristic energy scales present in YBa_2Cu_3O_{6+y} by using adjustable parameters representing phase stiffnesses and allows for strong anisotropy within basal planes to simulate oxygen ordering. We solve the model calculated T_c for chosen system parameters investigating the influence of oxygen ordering and doping imbalance on the shape of YBa_2Cu_3O_{6+y} phase diagram. Our results suggest that the oxygen ordering alone does not seem to be responsible for the existence of the 60 K plateau. However, relying on experimental data unveiling that oxygen doping of YBa_2Cu_3O_{6+y} may introduce a significant charge imbalance between CuO_2 planes and other sites, we show that simultaneously the former are underdoped, while the latter - strongly overdoped almost in the whole region of oxygen doping in which YBa_2Cu_3O_{6+y} is superconducting. This provides two natural counter acting factors, which possibly lead to rise the 60 K plateau with increasing oxygen doping.
  • Institute of Low Temperature and Structure Research, Polish Academy of Sciences, P.O. Box 1410, 50-950 Wrocław, Poland
  • Institute of Low Temperature and Structure Research, Polish Academy of Sciences, P.O. Box 1410, 50-950 Wrocław, Poland
  • 1. J.M.S. Skakle, Mater. Sci. Eng., R23, 1, 1998
  • 2. M. Merz, N. Nucker, P. Schweiss, S. Schuppler, C.T. Chen, V. Chakarian, J. Freeland, Y.U. Idzerda, M. Klaser, G. Muller-Vogt, Th. Wolf, Phys. Rev. Lett., 80, 5192, 1998
  • 3. A. Ourmazd, J.C.H. Spence, Nature (London), 329, 425, 1987
  • 4. C. Chaillout, M.A. Alario-Franco, J.J. Capponi, J. Chenavas, J.L. Hodeau, M. Marezio, Phys. Rev. B, 36, 7118, 1987
  • 5. H.F. Poulsen, N.H. Andersen, J.V. Andersen, H. Bohrt, O.G. Mouritsen, Nature (London), 349, 594, 1991
  • 6. Y. Yan, M.G. Blanchin, C. Picard, P. Gerdanian, J. Mater. Chem., 3, 603, 1993
  • 7. K. Segawa, Y. Ando, J. Low Temp. Phys., 131, 822, 2003; M.K. Wu, J.R. Ashburn, C.J. Torng, P.H. Hor, R.L. Meng, L. Gao, Z.J. Huang, Y.Q. Wang, C.W. Chu, Phys. Rev. Lett., 58, 908, 1987
  • 8. T.A. Zaleski, T.K. Kopeć, Phys. Rev. B, 71, 014519, 2005
  • 9. V.J. Emery, S.A. Kivelson, Nature, 374, 434, 1995
  • 10. S. Fishman, T.A.L. Ziman, Phys. Rev. B, 26, 1258, 1982
  • 11. T.A. Zaleski, T.K. Kopeć, Phys. Rev. B, 74, 014504, 2006
  • 12. J.L. Tallon, C. Bernhard, H. Shaked, R.L. Hitterman, J.D. Jorgensen, Phys. Rev. B, 51, 12911, 1995
  • 13. L. Li, S. Cao, F. Liu, W. Li, C. Chi, C. Jing, J. Zhan, Physica C, 418, 43, 2005
  • 14. R. Beyers, B.T. Ahn, G. Gorman, V.Y. Lee, S.S.P. Parkin, M.L. Ramirez, K.P. Roche, J.E. Vazquez, T.M. Gur, R.A. Huggins, Nature (London), 340, 619, 1989
  • 15. R.J. Cava, B. Batlogg, C.H. Chen, E.A. Rietman, S.M. Zahurak, D. Werder, Nature (London), 329, 423, 1987
Document Type
Publication order reference
YADDA identifier
JavaScript is turned off in your web browser. Turn it on to take full advantage of this site, then refresh the page.