6533b7d3fe1ef96bd1260925
RESEARCH PRODUCT
Surface-state electrons on a hydrogen film. 1. Annealing of the film
Paul LeidererKimitoshi KonoUwe Albrechtsubject
Materials scienceAnnealing (metallurgy)Analytical chemistryThermodynamicsActivation energySurface finishConductivityCondensed Matter PhysicsAtomic and Molecular Physics and OpticsSurface conductivityElectrical resistivity and conductivitySurface roughnessGeneral Materials ScienceThin filmdescription
We have investigated the surface of thin films (thickness ∼2 µm) of solid H2 between 1.5 and 4.2 K by measuring the ac conductivity of surface-state electrons (SSE). The films were prepared on a glass substrate by quench condensation at 1.5 K and were therefore initially strongly disordered. In fact the surface of the virgin films before any heat treatment was so rough that no current due to SSE could be observed. Annealing the films decreased the surface roughness and gave rise to a thermal-activation-type temperature dependence of the SSE conductivity. By proper heat treatment up to 8 K the activation energy could be reduced to 10kB.
| year | journal | country | edition | language |
|---|---|---|---|---|
| 1991-03-01 | Journal of Low Temperature Physics |