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Research Highlight | Materials Science Division

Hybrid sound waves in nanowires

In a study published in Physical Review Letters, researchers found two sound modes emerge as hybrids of the first and second sounds and combine oscillations of both density and entropy of the liquid.

Scientific Achievement

We have predicted that in a high magnetic field the electron liquid in nanowires supports two hybrid sound waves, combining oscillations of density and temperature.

Significance and Impact

Our discovery offers a possibility of effective cooling of computer circuits through nanowires.

Research Details

  • Electrons in the wire are described as a quantum liquid, in which excitations form a gas moving at its own velocity.
  • The system supports two sound modes propagating at different speeds.
  • This contrasts with ordinary fluids where only one sound, the density wave, is supported.

DOI: 10.1103/PhysRevLett.121.026803

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