Imaging phonons in a superconductor
M. R. Hauser, R. Gaitskell, J. P. Wolfe
DOI 10.1103/PhysRevB.60.3072 · Physical Review B
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Abstract
We present images of acoustic phonons propagating ballistically through a single crystal of metal: superconducting Nb. Phonons with energy less than twice the superconducting gap have greatly reduced scattering from electrons and can propagate millimeter distances without scattering. We have observed sharp phonon-focusing patterns in niobium. Time and space dependences of the heat pulses provide useful information about the propagation of phonons and quasiparticles in Nb and potentially other superconductors.
Source-reported materials — not catalogue approval
| Formula | Reported Tc (K) | Pressure (GPa) | Type |
|---|---|---|---|
| Nb Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula. | — | Pressure not reported | unknown |
| Al Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula. | 2.1 | Pressure not reported | onset |
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