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Phase diagram of the 2D $^4$He in the density-temperature plane
Thin $^4$He films adsorbed to weakly attractive substrates form nearly 2D layers. We describe the vortices in 2D superfluid $^4$He like quasiparticles. With the aid of a variational many-body calculation we estimate their inertial mass and describe their interactions with the $^4$He particles and ot...
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| Format: | Default Preprint |
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1996
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| Online Access: | https://hdl.handle.net/2134/1232 |
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| _version_ | 1818174938182320128 |
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| author | Feodor Kusmartsev M. Saarela |
| author_facet | Feodor Kusmartsev M. Saarela |
| author_sort | Feodor Kusmartsev (1251207) |
| collection | Figshare |
| description | Thin $^4$He films adsorbed to weakly attractive substrates form nearly 2D layers. We describe the vortices in 2D superfluid $^4$He like quasiparticles. With the aid of a variational many-body calculation we estimate their inertial mass and describe their interactions with the $^4$He particles and other vortices. Third sound measurements revealed anomalous behavior below the BKT-phase transition temperature. We ascribe this to the sound mode traveling in the fluid of vortex-antivortex pairs. These pairs forms a crystal (or liquid crystal) when the film thickness increases, the third sound mode splits into two separate modes as seen in experiments. Our many-body calculation predicts the critical density, at which the phase transition into the vortex-antivortex state at zero temperature occurs. We also describe the phase diagram of thin $^4$He films. |
| format | Default Preprint |
| id | rr-article-9411557 |
| institution | Loughborough University |
| publishDate | 1996 |
| record_format | Figshare |
| spelling | rr-article-94115571996-01-01T00:00:00Z Phase diagram of the 2D $^4$He in the density-temperature plane Feodor Kusmartsev (1251207) M. Saarela (7171433) Other physical sciences not elsewhere classified untagged Physical Sciences not elsewhere classified Thin $^4$He films adsorbed to weakly attractive substrates form nearly 2D layers. We describe the vortices in 2D superfluid $^4$He like quasiparticles. With the aid of a variational many-body calculation we estimate their inertial mass and describe their interactions with the $^4$He particles and other vortices. Third sound measurements revealed anomalous behavior below the BKT-phase transition temperature. We ascribe this to the sound mode traveling in the fluid of vortex-antivortex pairs. These pairs forms a crystal (or liquid crystal) when the film thickness increases, the third sound mode splits into two separate modes as seen in experiments. Our many-body calculation predicts the critical density, at which the phase transition into the vortex-antivortex state at zero temperature occurs. We also describe the phase diagram of thin $^4$He films. 1996-01-01T00:00:00Z Text Preprint 2134/1232 https://figshare.com/articles/preprint/Phase_diagram_of_the_2D_4_He_in_the_density-temperature_plane/9411557 CC BY-NC-ND 4.0 |
| spellingShingle | Other physical sciences not elsewhere classified untagged Physical Sciences not elsewhere classified Feodor Kusmartsev M. Saarela Phase diagram of the 2D $^4$He in the density-temperature plane |
| title | Phase diagram of the 2D $^4$He in the density-temperature plane |
| title_full | Phase diagram of the 2D $^4$He in the density-temperature plane |
| title_fullStr | Phase diagram of the 2D $^4$He in the density-temperature plane |
| title_full_unstemmed | Phase diagram of the 2D $^4$He in the density-temperature plane |
| title_short | Phase diagram of the 2D $^4$He in the density-temperature plane |
| title_sort | phase diagram of the 2d $^4$he in the density-temperature plane |
| topic | Other physical sciences not elsewhere classified untagged Physical Sciences not elsewhere classified |
| url | https://hdl.handle.net/2134/1232 |