Observation of Electron-Phonon Interaction with Soft Phonons in Superconducting RNi2B2C
I. K. Yanson, V. V. Fisun, A. G. M. Jansen, P. Wyder, P. C. Canfield, B. K. Cho, C. V. Tomy, D. McK. Paul
DOI 10.1103/PhysRevLett.78.935 · Physical Review Letters
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Abstract
The point-contact (PC) spectra of the electron-phonon interaction (EPI) in the superconducting RNi2B2C ( R=Ho,Y) compounds reveal strong EPI with low-energy (4–9 meV) phonons, unlike the case of nonsuperconducting LaNi2B2C. The PC-EPI spectral functions for all three compounds are determined and lower limits for the EPI interaction parameter λ estimated. Besides, an unusual suppression of the PC-EPI spectral intensity by the external magnetic field was observed for the superconducting compounds, unlike the nonsuperconducting one.
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. | 15.4 | Pressure not reported | unknown |
| HoNi2B2C Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula. | 8.7 | Pressure not reported | unknown |
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