| Autor: |
Babkin, A. V., Alles, H., Hakonen, Pertti J., Parshin, A. Ya., Ruutu, J. P., Saramäki, J. P. |
| Přispěvatelé: |
Perustieteiden korkeakoulu, School of Science, Teknillisen fysiikan laitos, Department of Applied Physics, Aalto-yliopisto, Aalto University |
| Jazyk: |
angličtina |
| Rok vydání: |
1995 |
| Předmět: |
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| Popis: |
The equilibrium shape of hcp 4He crystals has been studied at temperatures 0.05≤T≤0.7 K by means of a high-precision optical interferometer. We find that the profile of the interfacial boundary, close to an almost horizontal c-facet, has a well-defined slope discontinuity separating two angular regions with different behavior of the surface stiffness α̃. For surfaces tilted by an angle φ≲100 μrad with respect to the c-facet, we obtain α̃=κ/φ, contrary to the linear angular dependence predicted by current theories. Our results on four large crystals yield κ=(11±3)×10 exp −4T erg/ cm exp 2 K. |
| Databáze: |
OpenAIRE |
| Externí odkaz: |
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