ENERGY-GAP DISTRIBUTION ON POLYCRYSTALLINE HGBA2CUO4+DELTA OBSERVED BY SCANNING TUNNELING SPECTROSCOPY

Authors
JESS P HUBLER U LANG HP GUNTHERODT HJ LUDERS K ANTIPOV E
Citation
P. Jess et al., ENERGY-GAP DISTRIBUTION ON POLYCRYSTALLINE HGBA2CUO4+DELTA OBSERVED BY SCANNING TUNNELING SPECTROSCOPY, Czechoslovak journal of Physics, 46, 1996, pp. 1337-1338
Citations number
8
Categorie Soggetti
Physics
Journal title
Czechoslovak journal of Physics → ACNP
ISSN journal
00114626
Volume
46
Year of publication
1996
Supplement
3
Pages
1337 - 1338
Database
ISI
SICI code
0011-4626(1996)46:<1337:EDOPHO>2.0.ZU;2-Q
Abstract
Polycrystalline HgBa2CuO4+delta (T-c = 96 K) is studied in the superco nducting state using a low temperature scanning tunneling microscope ( STM). The superconducting energy gap Delta is determined by electron t unneling spectroscopy at different locations on the sample surface. Hi stograms of the extracted gaps reveal 2 values (8.5+/-1.6 meV and 15.1 +/-1.4 meV). We attribute this result to the presence of different cry stallographic faces with different gap values, indicating gap anisotro py.