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Third Sound in Superfluid 4He Films ...

Menachekanian, Emin.

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Third Sound in Superfluid 4He Films Adsorbed on Packed Multiwall Carbon Nanotubes.

紀錄類型:	書目-電子資源 : Monograph/item
正題名/作者:	Third Sound in Superfluid 4He Films Adsorbed on Packed Multiwall Carbon Nanotubes./
作者:	Menachekanian, Emin.
面頁冊數:	203 p.
附註:	Source: Dissertation Abstracts International, Volume: 75-09(E), Section: B.
Contained By:	Dissertation Abstracts International75-09B(E).
標題:	Low temperature physics. -
電子資源:	http://pqdd.sinica.edu.tw/twdaoapp/servlet/advanced?query=3622709
ISBN:	9781303946103

Third Sound in Superfluid 4He Films Adsorbed on Packed Multiwall Carbon Nanotubes.
Menachekanian, Emin.

Third Sound in Superfluid 4He Films Adsorbed on Packed Multiwall Carbon Nanotubes. - 203 p.

Source: Dissertation Abstracts International, Volume: 75-09(E), Section: B.

Thesis (Ph.D.)--University of California, Los Angeles, 2014.

Third sound is studied for superfluid films of 4He adsorbed on multiwall carbon nanotubes packed into an annular resonator. The third sound is generated with mechanical oscillation of the cell, and detected with carbon bolometers. A filling curve at temperatures near 250 mK shows oscillations in the third sound velocity, with maxima at the completion of the 4th and 5th atomic layers. Sharp changes in the Q factor of the third sound are found at partial layer fillings. Temperature sweeps at a number of fill points show strong broadening effects on the Kosterlitz-Thouless (KT) transition, and rapidly increasing dissipation, in qualitative agreement with the predictions of Machta and Guyer. At the 4th layer completion there is a sudden reduction of the transition temperature TKT , and then a recovery back to linear variation with fill, although the slope is considerably smaller than the KT prediction. These effects might be related to changes in the gas-liquid coexistence regions.

ISBN: 9781303946103Subjects--Topical Terms:

3173917
Low temperature physics.

Third Sound in Superfluid 4He Films Adsorbed on Packed Multiwall Carbon Nanotubes.
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500 $a Source: Dissertation Abstracts International, Volume: 75-09(E), Section: B.
500 $a Adviser: Gary A. Williams.
502 $a Thesis (Ph.D.)--University of California, Los Angeles, 2014.
520 $a Third sound is studied for superfluid films of 4He adsorbed on multiwall carbon nanotubes packed into an annular resonator. The third sound is generated with mechanical oscillation of the cell, and detected with carbon bolometers. A filling curve at temperatures near 250 mK shows oscillations in the third sound velocity, with maxima at the completion of the 4th and 5th atomic layers. Sharp changes in the Q factor of the third sound are found at partial layer fillings. Temperature sweeps at a number of fill points show strong broadening effects on the Kosterlitz-Thouless (KT) transition, and rapidly increasing dissipation, in qualitative agreement with the predictions of Machta and Guyer. At the 4th layer completion there is a sudden reduction of the transition temperature TKT , and then a recovery back to linear variation with fill, although the slope is considerably smaller than the KT prediction. These effects might be related to changes in the gas-liquid coexistence regions.
590 $a School code: 0031.
650 4 $a Low temperature physics. $3 3173917
650 4 $a Condensed matter physics. $3 3173567
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