Tunneling spectroscopy into substituted YBaCuO systems

A. M. Cucolo, R. Di Leo, A. Nigro, P. Romano, Lynn Schneemeyer

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1 Citation (Scopus)

Abstract

We have studied the tunneling characteristics of Gd and Al substituted YBa2Cu3O7-δ single crystals with Tc = 90 K and 80 K respectively. The high-Tc superconductos were etched 30 min in a 1% Br solution in methanol and the tunnel barriers were formed by exposing the crystals to the ambient atmosphere for about 30 min. Pb film counterelectrodes were thermally evaporated through a metallic mask. No relevant differences have been found in the differential resistance vs voltage of undoped 90 K and Gd junctions, so confirming that Gd is substituting for Y. A different behavior has been found in the Al doped junctions that show smeared structures of reduced amplitude.

Original languageEnglish
Pages (from-to)1743-1744
Number of pages2
JournalPhysica B: Physics of Condensed Matter
Volume194-196
Issue numberPART 2
DOIs
StatePublished - 2 Feb 1994

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Methanol
Masks
Tunnels
Single crystals
Spectroscopy
Crystals
Electric potential
spectroscopy
tunnels
masks
methyl alcohol
atmospheres
single crystals
electric potential
crystals
barium copper yttrium oxide

Cite this

Cucolo, A. M. ; Di Leo, R. ; Nigro, A. ; Romano, P. ; Schneemeyer, Lynn. / Tunneling spectroscopy into substituted YBaCuO systems. In: Physica B: Physics of Condensed Matter. 1994 ; Vol. 194-196, No. PART 2. pp. 1743-1744.
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Tunneling spectroscopy into substituted YBaCuO systems. / Cucolo, A. M.; Di Leo, R.; Nigro, A.; Romano, P.; Schneemeyer, Lynn.

In: Physica B: Physics of Condensed Matter, Vol. 194-196, No. PART 2, 02.02.1994, p. 1743-1744.

Research output: Contribution to journalArticle

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