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 National Science
Foundation Award #9014865 |
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Electron Arrays in Two Dimensions
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| Investigator(s): |
Arnold Dahm (PI)
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| Sponsor: |
Case Western Reserve University, OH 44106 2163684510
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| Start Date/Expiration Date |
1990-11-01 to 1991-04-30 (amended 1990-11-08) |
| Awarded Amount to Date: |
$50,000 |
| Abstract: They propose to measure the linewidth of phonons in the lattice phase of electrons on the surface of liquid helium to check the weak coupling theory of longitudinal phonon linewidths. This theory predicts the linewidths to vary inversely with the phonon frequency, and predicts the density and temperature dependence of the linewidth. A maximum in the linewidth is predicted at about one-tenth the melting temperature. This results from a reduction in scattering at high temperatures due to the Debye-Waller factor. The weak coupling approximation is expected to hold for densities below 107/cm. Their measurements should check the range of validity of this theory. |
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| NSF Org: |
DMR - Division of Materials Research |
| Award Number: |
9014865 |
| Award Instrument: |
Standard Grant |
| Program Manager: |
DMR Division of Materials Research
MPS Directorate for Mathematical & Physical Sciences
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| NSF Program(s): |
LOW TEMPERATURE PHYSICS, LOW TEMPERATURE PHYSICS
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| Field Application(s): |
Materials Research, Physics |
| Program Element Code(s): |
1764
, 1764
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