Superconducting properties of La-substituted Bi-2201 crystals

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 whol...

Full description

Saved in:
Bibliographic Details
Published in:arXiv.org 2001-11
Main Authors: Ponomarev, Ya G, Timergaleev, N Z, Kim Ki Uk, Lorenz, M A, Mueller, G, Piel, H, Schmidt, H, Krapf, A, Os'kina, T E, Tretyakov, Yu D, Kozlovskii, V F
Format: Article
Language:English
Subjects:
Bismuth strontium calcium copper oxide
Critical temperature
Crystals
Single crystals
Superconductivity
Online Access:Get full text
Tags: Add Tag
No Tags, Be the first to tag this record!
Description
Summary: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.
ISSN:2331-8422