SPECTROSCOPY STUDY OF HG1BA2CA2CU3O8-TUNNELING-MICROSCOPY(X BY SCANNING)

Authors
ROSSEL C SCHULZ RR SCHILLING A OTT HR KARPINSKI J
Citation
C. Rossel et al., SPECTROSCOPY STUDY OF HG1BA2CA2CU3O8-TUNNELING-MICROSCOPY(X BY SCANNING), Physica. C, Superconductivity, 235, 1994, pp. 1871-1872
Citations number
6
Categorie Soggetti
Physics, Applied
Journal title
Physica. C, Superconductivity → ACNP
ISSN journal
09214534
Volume
235
Year of publication
1994
Part
3
Pages
1871 - 1872
Database
ISI
SICI code
0921-4534(1994)235:<1871:SSOHBS>2.0.ZU;2-B
Abstract
We have measured the tunnel conductance of sintered Hg-1223 supercondu ctor (T-c onset = 133 K) using a low-temperature STM with Au tips. In spite of spatial fluctuations due to sample surface inhomogeneity gap- like structures are found with Delta congruent to 24 +/- 2 mV at 4.2 K . These values remain almost constant up to at least 80 K. The usual b ackground conductance is parabolic, and ohmic in fewer cases. Samples melted under high pressure have also been investigated.