Abstract
We have observed enhanced Kosterlitz-Thouless transitions in multilayers composed of YBa2Cu3O7-x with a thickness of two and four unit cells, separated by PrBa2Cu3O7-x sufficient to isolate them from one another. The parameter τKT=(Tc0-TKT)/Tc0 is up to an order of magnitude larger than in single crystals or in films, showing that two-dimensional behavior is approached more closely in the multilayers. The fact that the enhancement of two-dimensionality is accompanied by a lowering of Tc0 demonstrates the importance of interlayer coupling.
Original language | English (US) |
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Pages (from-to) | 7094-7097 |
Number of pages | 4 |
Journal | Physical Review B |
Volume | 44 |
Issue number | 13 |
DOIs | |
State | Published - 1991 |
All Science Journal Classification (ASJC) codes
- Condensed Matter Physics