Enhanced Superconductivity by Electron Renormalization of a Directly Observed Brout-Visscher Local Phonon: Re in Mo1−xRex
Danny P. Shum, A. Bevolo, J. L. Staudenmann, E. L. Wolf
DOI 10.1103/PhysRevLett.57.2987 · Physical Review Letters
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Abstract
Tunneling reveals a ∼14-meV resonance mode of Re in Mo1−xRex, 0.2<x<0.4, which contributes strongly to α2F(ω) and to strong coupling, 2ΔkTc−3.53=δ>0. The anomalous softening and width of the resonance mode are consistent with the standard theory of phonon renormalization by the electron gas. These unexpected results explain the low-N(0), high-Tc behavior of Mo0.6Re0.4 and possible Nb3Ge.
Source-reported materials — not catalogue approval
| Formula | Reported Tc (K) | Pressure (GPa) | Type |
|---|---|---|---|
| Mo1-xRex Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula. | 12.3 | Pressure not reported | unknown |
| Mo0.6Re0.4 Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula. | 12.3 | Pressure not reported | unknown |
| Mo Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula. | 0.92 | Pressure not reported | unknown |
| Nb3Ge Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula. | 22 | Pressure not reported | unknown |
| MoRe 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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