Possible d+id scenario in La_{2-x}Sr_{x}CuO_4 by point-contact measurements

D. Daghero; R. S. Gonnelli; G. A. Ummarino; V. A. Stepanov

doi:10.1142/S0217979203016376

Possible d+id scenario in La_{2-x}Sr_{x}CuO_4 by point-contact measurements

Superconductivity 2009-11-07 v2

Authors: D. Daghero , R. S. Gonnelli , G. A. Ummarino , V. A. Stepanov

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Abstract

We analyze the results of point-contact measurements in La_{2-x}Sr_{x}CuO_{4} (LSCO) previously reported as a clear evidence of the separation between gap and pseudogap in this copper oxide. Here we show that, in addition to this, the conductance curves of our point-contact junctions -- showing clear Andreev reflection features -- can be interpreted as supporting a nodeless d_{x^2-y^2}+id_{xy}-wave symmetry of the gap in LSCO. The results of our analysis, in particular the doping dependence of the subdominant d_{xy} gap component, are discussed and compared to the predictions of different theoretical models.

Keywords

point-contact measurements gap symmetry d+id scenario Andreev reflection pseudogap

Cite

@article{arxiv.cond-mat/0207411,
  title  = {Possible d+id scenario in La_{2-x}Sr_{x}CuO_4 by point-contact measurements},
  author = {D. Daghero and R. S. Gonnelli and G. A. Ummarino and V. A. Stepanov},
  journal= {arXiv preprint arXiv:cond-mat/0207411},
  year   = {2009}
}

Comments

6 pages, 4 eps figures, presented at SATT11 Conference (Vietri sul Mare, March 2002). To appear in Int. J. Mod. Phys

Possible d+id scenario in La_{2-x}Sr_{x}CuO_4 by point-contact measurements

Abstract

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