SCANNING TUNNELING SPECTROSCOPY ON YBA2CU3OY PRBA2CU3OY/YBA2CU3OY SANDWICHED JUNCTIONS AND YBA2CU3OY/Y0.5PR0.5BA2CU3OY SUPERLATTICES/

Authors
YANG HC YU HW KUO CC HORNG HE YANG SY
Citation
Hc. Yang et al., SCANNING TUNNELING SPECTROSCOPY ON YBA2CU3OY PRBA2CU3OY/YBA2CU3OY SANDWICHED JUNCTIONS AND YBA2CU3OY/Y0.5PR0.5BA2CU3OY SUPERLATTICES/, Physica. C, Superconductivity, 282, 1997, pp. 2443-2444
Citations number
9
Categorie Soggetti
Physics, Applied
Journal title
Physica. C, Superconductivity → ACNP
ISSN journal
09214534
Volume
282
Year of publication
1997
Part
4
Pages
2443 - 2444
Database
ISI
SICI code
0921-4534(1997)282:<2443:STSOYP>2.0.ZU;2-#
Abstract
The differential conductance, (dI/dV), on YBa2Cu3Oy/PrBa2Cu3Oy/YBa2Cu3 Oy (YBCO/PBCO/YBCO) sandwiched junctions and YBa2Cu3Oy/Y0.5Pr0.5Ba2Cu3 Oy (YBCO/YPBCO) superlattices was measured with STM at various tempera ture ranges to investigate the proximity effects. The dI/dV curves sho w conductance peaks at low temperatures and the energy gap, 2 Delta(ab ), derived from the peaks is equal to about 46 meV for YBCO/PBCO/YBCO sandwiched junctions, which is consistent with the data obtained from reported data on YBCO single crystals whereas the YBCO/YPBCO ((120 Ang strom/60 Angstrom)x8) superlattices, due to the reduction of T-c, show smaller gap value.