Observation of a new surface state on 4He crystal interfaces

Alexei Babkin; Harry Alles; Pertti Hakonen; Alexander Parshin; Jussi Ruutu; Jari Saramäki

doi:10.1007/BF02569648

Observation of a new surface state on ⁴He crystal interfaces

Alexei Babkin^*, Harry Alles, Pertti Hakonen, Alexander Parshin, Jussi Ruutu, Jari Saramäki

^*Corresponding author for this work

Department of Applied Physics

Russian Academy of Sciences

Research output: Contribution to journal › Article › Scientific › peer-review

Abstract

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.

Original language	English
Pages (from-to)	465-466
Number of pages	2
Journal	Czechoslovak Journal of Physics
Volume	46
Issue number	Suppl. 1
DOIs	https://doi.org/10.1007/BF02569648
Publication status	Published - 1996
MoE publication type	A1 Journal article-refereed

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title = "Observation of a new surface state on 4He crystal interfaces",

abstract = "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 {\~α}. For surfaces tilted by an angle Φ ≤ 100 μrad with respect to the c-facet, we obtain {\~α} = κ/Φ, contrary to the linear angular dependence predicted by current theories.",

author = "Alexei Babkin and Harry Alles and Pertti Hakonen and Alexander Parshin and Jussi Ruutu and Jari Saram{\"a}ki",

year = "1996",

doi = "10.1007/BF02569648",

language = "English",

volume = "46",

pages = "465--466",

journal = "Czechoslovak Journal of Physics",

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T1 - Observation of a new surface state on 4He crystal interfaces

AU - Babkin, Alexei

AU - Alles, Harry

AU - Hakonen, Pertti

AU - Parshin, Alexander

AU - Ruutu, Jussi

AU - Saramäki, Jari

PY - 1996

Y1 - 1996

N2 - 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.

AB - 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.

UR - http://www.scopus.com/inward/record.url?scp=77957903248&partnerID=8YFLogxK

U2 - 10.1007/BF02569648

DO - 10.1007/BF02569648

M3 - Article

AN - SCOPUS:77957903248

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VL - 46

SP - 465

EP - 466

JO - Czechoslovak Journal of Physics

JF - Czechoslovak Journal of Physics

IS - Suppl. 1

ER -

Observation of a new surface state on ⁴He crystal interfaces

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