| Autor: |
E, Boaknin, R W, Hill, C, Proust, C, Lupien, L, Taillefer, P C, Canfield |
| Rok vydání: |
2001 |
| Zdroj: |
Physical review letters. 87(23) |
| ISSN: |
0031-9007 |
| Popis: |
The thermal conductivity of borocarbide superconductor LuNi(2)B(2)C was measured down to 70 mK (T(c)/200) in a magnetic field perpendicular to the heat current from H = 0 to above H(c2) = 7 T. As soon as vortices enter the sample, the conduction at T--0 grows rapidly, showing unambiguously that delocalized quasiparticles are present at the lowest energies. The field dependence is very similar to that of UPt(3), a heavy-fermion superconductor with a line of nodes in the gap, and very different from the exponential dependence characteristic of s-wave superconductors. This is strong evidence for a highly anisotropic gap function in LuNi(2)B(2)C, possibly with nodes. |
| Databáze: |
OpenAIRE |
| Externí odkaz: |
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