Superconducting properties of La-substituted Bi-2201 crystals

Ya. G. Ponomarev; N. Z. Timergaleev; Kim Ki Uk; M. A. Lorenz; G. Mueller; H. Piel; H. Schmidt; A. Krapf; T. E. Os'kina; Yu. D. Tretyakov; V. F. Kozlovskii

Superconducting properties of La-substituted Bi-2201 crystals

Superconductivity 2007-05-23 v1 Strongly Correlated Electrons

Authors: Ya. G. Ponomarev , N. Z. Timergaleev , Kim Ki Uk , M. A. Lorenz , G. Mueller , H. Piel , H. Schmidt , A. Krapf , T. E. Os'kina , Yu. D. Tretyakov , V. F. Kozlovskii

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Abstract

The superconducting gap Delta has been measured in Bi2Sr2-xLaxCuO6+d single crystals in a wide range of temperatures 4.2 K < T < Tc by point-contact and tunnelling spectroscopy for current in c-direction. The value of Delta(4.2 K) was found to scale with the critical temperature Tc in the whole range of doping levels with the ratio 2D/kTc = 12.5 +/- 2. The closing of the gap Ds at T = Tc has been registered in the underdoped, optimally doped as well as in the overdoped sam-ples.

Keywords

superconducting gap Bi-2201 crystals point-contact spectroscopy tunnelling spectroscopy doping

Cite

@article{arxiv.cond-mat/0111340,
  title  = {Superconducting properties of La-substituted Bi-2201 crystals},
  author = {Ya. G. Ponomarev and N. Z. Timergaleev and Kim Ki Uk and M. A. Lorenz and G. Mueller and H. Piel and H. Schmidt and A. Krapf and T. E. Os'kina and Yu. D. Tretyakov and V. F. Kozlovskii},
  journal= {arXiv preprint arXiv:cond-mat/0111340},
  year   = {2007}
}

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