Evidence of Gap Anisotropy in Superconducting YNi2B2C Using Directional Point-Contact Spectroscopy
P. Raychaudhuri, D. Jaiswal-Nagar, Goutam Sheet, S. Ramakrishnan, H. Takeya
DOI 10.1103/PhysRevLett.93.156802 · Physical Review Letters
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Abstract
We present a study of the anisotropy in the superconducting energy gap in a single crystal of YNi2B2C (Tc∼14.6 K) using directional point-contact spectroscopy. The superconducting energy gap at 2.7 K, when measured for I||c, is 4.5 times larger than that for I||a. The energy gaps in the two directions also have different temperature dependences. Our results support a scenario with s+g like symmetry.
Source-reported materials — not catalogue approval
| Formula | Reported Tc (K) | Pressure (GPa) | Type |
|---|---|---|---|
| YNi2B2C Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula. | 14.6 | Pressure not reported | unknown |
| Sr2RuO4 Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula. | — | Pressure not reported | unknown |
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