Abstract
A phenomenological model including interlayer pairing interactions is proposed for high-Tc cuprate superconductors. Modified Eliashberg equations corresponding to the model are derived and numerically solved. The results show that the trends of Tcs for known high-Tc materials can be described reasonably well by mechanisms including (in addition to the phonon interactions) nonphonon, intralayer- and interlayer-pairing interactions. The calculated gap values (3.620/kBTc4.2) do not deviate significantly from the canonical BCS value of 3.5. This model can be applicable to layer-structured superconductors in general, whether they are high-Tc or low-Tc superconductors.
| Original language | English |
|---|---|
| Pages (from-to) | 8007-8015 |
| Number of pages | 9 |
| Journal | Physical Review B |
| Volume | 45 |
| Issue number | 14 |
| DOIs | |
| State | Published - 1992 |