: a quantum of vibrational energy (as in a crystal)
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Their conductivity is limited by the strong interactions between free-moving electrons and atomic vibrations called phonons.—Abhimanyu Ghoshal, New Atlas, 27 Jan. 2026 These measurements revealed extremely weak electron–phonon interactions, enabling heat to flow far more efficiently than in conventional metals.—Prabhat Ranjan Mishra, Interesting Engineering, 21 Jan. 2026 These phonons can pile up at the boundary between materials, resisting the flow of heat.—IEEE Spectrum, 20 Oct. 2025 Then the electron grid relaxes, and its ripples pair electrons the way phonons do.—Charlie Wood, WIRED, 12 Jan. 2025 See All Example Sentences for phonon
Word History
Etymology
borrowed from Russian fonon, from Greek phōnḗ "sound made by something living, voice" + Russian -on-on entry 2 — more at phono-