Gumann, P. ; Shimizu, N. ; Penzev, A. ; Yasuta, Y. ; Kubota, M. (2009)
Supersolid ⁴He under DC rotation: Energy dissipation for slow and fast temperature sweeps.
In: Journal of Physics: Conference Series, 150 (3)
doi: 10.1088/1742-6596/150/3/032026
Artikel, Bibliographie
Dies ist die neueste Version dieses Eintrags.
Kurzbeschreibung (Abstract)
In this report, we describe torsional oscillator (TO) measurements under DC rotation of a 49 bar 4He-sample, at Vac = 0.2 mm/s. We investigated the behavior of the energy dissipation (∼ ΔQ⁻¹) as well as the supersolid fraction for different rotation velocities (0 < Ω < 1.256 rad/s) and Vac = 0.06, 0.2 mm/s in the temperature range of from 47 mK to 150 mK, using fast (∼3h) and slow (∼ 55h) temperature sweeps. Variation of Ω did not influence the supersolid fraction. The performed analyzes have shown a linear increase of the ΔQ⁻¹ vs. Ω for high Vac = 0.2 mm/s (for fast and slow temperature sweeps). In the case of Vac = 0.06 mm/s, no change of the energy dissipation was observed up to Ω = 0.628 rad/s for the low temperature limit. These results suggest a possible explanation for the energy dissipation in supersolid ⁴He and its proportionality to the number of low dimensional vortices influenced by torsional oscillations. The 3D-vortex lines created by DC rotation can dissipate their energy by interaction with low dimensional vortices. Their dynamics under rotation are characterized by long relaxation times.
| Typ des Eintrags: | Artikel |
|---|---|
| Erschienen: | 2009 |
| Autor(en): | Gumann, P. ; Shimizu, N. ; Penzev, A. ; Yasuta, Y. ; Kubota, M. |
| Art des Eintrags: | Bibliographie |
| Titel: | Supersolid ⁴He under DC rotation: Energy dissipation for slow and fast temperature sweeps |
| Sprache: | Englisch |
| Publikationsjahr: | 1 Februar 2009 |
| Ort: | Bristol |
| Verlag: | IOP Publishing |
| Titel der Zeitschrift, Zeitung oder Schriftenreihe: | Journal of Physics: Conference Series |
| Jahrgang/Volume einer Zeitschrift: | 150 |
| (Heft-)Nummer: | 3 |
| Kollation: | 4 Seiten |
| DOI: | 10.1088/1742-6596/150/3/032026 |
| Zugehörige Links: | |
| Kurzbeschreibung (Abstract): | In this report, we describe torsional oscillator (TO) measurements under DC rotation of a 49 bar 4He-sample, at Vac = 0.2 mm/s. We investigated the behavior of the energy dissipation (∼ ΔQ⁻¹) as well as the supersolid fraction for different rotation velocities (0 < Ω < 1.256 rad/s) and Vac = 0.06, 0.2 mm/s in the temperature range of from 47 mK to 150 mK, using fast (∼3h) and slow (∼ 55h) temperature sweeps. Variation of Ω did not influence the supersolid fraction. The performed analyzes have shown a linear increase of the ΔQ⁻¹ vs. Ω for high Vac = 0.2 mm/s (for fast and slow temperature sweeps). In the case of Vac = 0.06 mm/s, no change of the energy dissipation was observed up to Ω = 0.628 rad/s for the low temperature limit. These results suggest a possible explanation for the energy dissipation in supersolid ⁴He and its proportionality to the number of low dimensional vortices influenced by torsional oscillations. The 3D-vortex lines created by DC rotation can dissipate their energy by interaction with low dimensional vortices. Their dynamics under rotation are characterized by long relaxation times. |
| ID-Nummer: | Artikel-ID: 032026 |
| Zusätzliche Informationen: | 25th International Conference on Low Temperature Physics (LT25) |
| Sachgruppe der Dewey Dezimalklassifikatin (DDC): | 500 Naturwissenschaften und Mathematik > 530 Physik |
| Fachbereich(e)/-gebiet(e): | 05 Fachbereich Physik 05 Fachbereich Physik > Institut für Physik Kondensierter Materie (IPKM) |
| Hinterlegungsdatum: | 31 Jan 2024 08:54 |
| Letzte Änderung: | 05 Feb 2024 07:19 |
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Supersolid ⁴He under DC rotation: Energy dissipation for slow and fast temperature sweeps. (deposited 30 Jan 2024 13:09)
- Supersolid ⁴He under DC rotation: Energy dissipation for slow and fast temperature sweeps. (deposited 31 Jan 2024 08:54) [Gegenwärtig angezeigt]
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