Enhanced ultrasonic attenuation in the superconducting state of Ho-rich Er1−xHoxRh4B4
Keun Jenn Sun, Moises Levy, M. B. Maple, M. S. Torikachvilli
DOI 10.1103/PhysRevLett.63.453 · Physical Review Letters
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Abstract
The temperature-dependent and magnetic-field-dependent ultrasonic-attenuation data of Ho-rich Er1−xHoxRh4B4 polycrystalline samples indicate that the attenuation increase observed throughout the superconducting state of this system is associated with the onset and existence of superconductivity. This attenuation behavior is different from any other which has been previously associated with superconductivity, where the attenuation either starts to decrease immediately below Tc or decreases after exhibiting a peak. We suggest that interaction with spin fluctuations or that perhaps a different BCS coherence factor may cause this anomalous behavior.
Source-reported materials — not catalogue approval
| Formula | Reported Tc (K) | Pressure (GPa) | Type |
|---|---|---|---|
| Er0.187Ho0.813Rh4B4 Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula. | 4.95 | Pressure not reported | onset |
| Er0.187Ho0.813Rh4B4 Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula. | 4.95 | Pressure not reported | onset |
| Er0.4Ho0.6Rh4B4 Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula. | 6.7 | Pressure not reported | onset |
| Er0.4Ho0.6Rh4B4 Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula. | 6.7 | Pressure not reported | onset |
| ErRh4B4 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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