Measurements of the superfluid fraction of 4He in 9.4 nm channels, 19 μm wide and 2000 μm long

Manuel Diaz-Avila; Francis M. Gasparini

doi:10.1063/1.2354635

Measurements of the superfluid fraction of ⁴He in 9.4 nm channels, 19 μm wide and 2000 μm long

Manuel Diaz-Avila
, Francis M. Gasparini

Physics

SUNY Buffalo

Research output: Chapter in Book/Report/Conference proceeding › Conference contribution › peer-review

Abstract

We report measurements of the superfluid fraction of ⁴He confined in small channels 9.4 nm high, 19 μm wide by 2000 μm long. This confinement corresponds to a film of finite lateral extent. The data show a shift in the transition to a lower temperature which is larger than the logarithmic dependence expected from finite-size scaling and Berezinskǐ -Kosterlitz-Thouless theory. This shift however is smaller than the one proposed by Sobnack and Kusmartsev for this kind of geometry. When examining the behavior of the shift for confinement at several widths, we found that the shift favors a power law with a larger exponent than predicted by Sobnack and Kusmartsev.

Original language	English
Title of host publication	LOW TEMPERATURE PHYSICS
Subtitle of host publication	24th International Conference on Low Temperature Physics - LT24
Pages	127-128
Number of pages	2
DOIs	https://doi.org/10.1063/1.2354635
State	Published - 2006
Event	LOW TEMPERATURE PHYSICS: 24th International Conference on Low Temperature Physics - LT24 - Orlando, FL, United States Duration: Aug 10 2006 → Oct 17 2006

Publication series

Name	AIP Conference Proceedings
Volume	850
ISSN (Print)	0094-243X
ISSN (Electronic)	1551-7616

Conference

Conference	LOW TEMPERATURE PHYSICS: 24th International Conference on Low Temperature Physics - LT24
Country/Territory	United States
City	Orlando, FL
Period	08/10/06 → 10/17/06

Keywords

Confined helium
Finite-size effects
Superfluidity

Access to Document

10.1063/1.2354635

Cite this

@inproceedings{b04ca151c8764095997efd7843137a97,

title = "Measurements of the superfluid fraction of 4He in 9.4 nm channels, 19 μm wide and 2000 μm long",

abstract = "We report measurements of the superfluid fraction of 4He confined in small channels 9.4 nm high, 19 μm wide by 2000 μm long. This confinement corresponds to a film of finite lateral extent. The data show a shift in the transition to a lower temperature which is larger than the logarithmic dependence expected from finite-size scaling and Berezinskǐ -Kosterlitz-Thouless theory. This shift however is smaller than the one proposed by Sobnack and Kusmartsev for this kind of geometry. When examining the behavior of the shift for confinement at several widths, we found that the shift favors a power law with a larger exponent than predicted by Sobnack and Kusmartsev.",

keywords = "Confined helium, Finite-size effects, Superfluidity",

author = "Manuel Diaz-Avila and Gasparini, \{Francis M.\}",

year = "2006",

doi = "10.1063/1.2354635",

language = "English",

isbn = "0735403473",

series = "AIP Conference Proceedings",

pages = "127--128",

booktitle = "LOW TEMPERATURE PHYSICS",

note = "LOW TEMPERATURE PHYSICS: 24th International Conference on Low Temperature Physics - LT24 ; Conference date: 10-08-2006 Through 17-10-2006",

}

Diaz-Avila, M & Gasparini, FM 2006, Measurements of the superfluid fraction of ⁴He in 9.4 nm channels, 19 μm wide and 2000 μm long. in LOW TEMPERATURE PHYSICS: 24th International Conference on Low Temperature Physics - LT24. AIP Conference Proceedings, vol. 850, pp. 127-128, LOW TEMPERATURE PHYSICS: 24th International Conference on Low Temperature Physics - LT24, Orlando, FL, United States, 08/10/06. https://doi.org/10.1063/1.2354635

Measurements of the superfluid fraction of ⁴He in 9.4 nm channels, 19 μm wide and 2000 μm long. / Diaz-Avila, Manuel; Gasparini, Francis M.
LOW TEMPERATURE PHYSICS: 24th International Conference on Low Temperature Physics - LT24. 2006. p. 127-128 (AIP Conference Proceedings; Vol. 850).

Research output: Chapter in Book/Report/Conference proceeding › Conference contribution › peer-review

TY - GEN

T1 - Measurements of the superfluid fraction of 4He in 9.4 nm channels, 19 μm wide and 2000 μm long

AU - Diaz-Avila, Manuel

AU - Gasparini, Francis M.

PY - 2006

Y1 - 2006

N2 - We report measurements of the superfluid fraction of 4He confined in small channels 9.4 nm high, 19 μm wide by 2000 μm long. This confinement corresponds to a film of finite lateral extent. The data show a shift in the transition to a lower temperature which is larger than the logarithmic dependence expected from finite-size scaling and Berezinskǐ -Kosterlitz-Thouless theory. This shift however is smaller than the one proposed by Sobnack and Kusmartsev for this kind of geometry. When examining the behavior of the shift for confinement at several widths, we found that the shift favors a power law with a larger exponent than predicted by Sobnack and Kusmartsev.

AB - We report measurements of the superfluid fraction of 4He confined in small channels 9.4 nm high, 19 μm wide by 2000 μm long. This confinement corresponds to a film of finite lateral extent. The data show a shift in the transition to a lower temperature which is larger than the logarithmic dependence expected from finite-size scaling and Berezinskǐ -Kosterlitz-Thouless theory. This shift however is smaller than the one proposed by Sobnack and Kusmartsev for this kind of geometry. When examining the behavior of the shift for confinement at several widths, we found that the shift favors a power law with a larger exponent than predicted by Sobnack and Kusmartsev.

KW - Confined helium

KW - Finite-size effects

KW - Superfluidity

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DO - 10.1063/1.2354635

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SN - 9780735403475

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T2 - LOW TEMPERATURE PHYSICS: 24th International Conference on Low Temperature Physics - LT24

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