Abstract
The thermal conductivity of high-quality untwinned single crystals of YBa2Cu3O6.9 was studied as a function of temperature (0.1 K < T < 1 K) and with heat current injected along two different orientations (a and b crystalline axes). We detect the presence of a linear term with comparable magnitude for the two orientations. This is in contrast with the high-temperature data, where an anisotropic behaviour is reported. The possible electronic origin of the linear term and its implication for the gap symmetry are discussed.
| Original language | English |
|---|---|
| Pages (from-to) | 1611-1612 |
| Number of pages | 2 |
| Journal | Synthetic Metals |
| Volume | 71 |
| Issue number | 1-3 |
| DOIs | |
| Publication status | Published - 1 Apr 1995 |
| Externally published | Yes |