Abstract
The effect of coupling between layers of the high-Tc superconductors was studied by varying both the YBa2Cu3O7-x and PrBa2Cu3O7-x layer thicknesses in YBa2Cu3O7-x/PrBa2Cu3O7-x superlattices. Superconductivity was found even when the YBa2Cu3O7-x layers had nominal thicknesses as small as 12 (one unit-cell thickness) but coupling between unit-cell layers is needed to achieve a Tc of 90 K. The decrease of Tc in isolated YBa2Cu3O7-x layers with increasing sheet resistance is on the same scale of about Latin small letter h with stroke/e2 as observed for ordinary superconductors.
Original language | English (US) |
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Pages (from-to) | 3086-3089 |
Number of pages | 4 |
Journal | Physical review letters |
Volume | 64 |
Issue number | 25 |
DOIs | |
State | Published - 1990 |
All Science Journal Classification (ASJC) codes
- General Physics and Astronomy