Nanotube-based source of charges for experiments with solid helium at low temperatures
Vernadsky National Library of Ukraine
Переглянути архів Інформація| Поле | Співвідношення | |
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Nanotube-based source of charges for experiments with solid helium at low temperatures
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| Creator |
Borisenko, D.N.
Walmsley, P.M. Golov, A.I. Kolesnikov, N.N. Kotov, Yu.V. Levchenko, A.A. Mezhov-Deglin, L.P. Fear, M.J. |
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| Subject |
10th International Conference on Cryocrystals and Quantum Crystals (Final part)
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| Description |
Methods of preparation of the field-emission sources of charges from carbon nanotubes suitable for study of injected charges in solid helium at low temperatures T < 1 K are presented. The sources have been prepared by arc discharge deposition of nanotubes onto a flat copper substrate or by mechanical rubbing of nanotubes into porous metal surface. The test study of the voltage-current characteristics of a diode cell with the nanotube source in superfluid He II have shown that at voltages above 120 V one can observe a relatively large current I ≥ 10⁻¹³ A of negative charges in liquid helium. The field and temperature dependences of positive and negative currents in solid ⁴He were studied in samples grown by the blocked capillary technique. Usage of the nanotube based source of injected charges had permitted us for the first time to observe motion of the positive charges in solid helium at temperatures below 0.1 К. The current-voltage dependence could be described by a power law I ~ U α , with the value of the exponent α >> 2, much higher than what one would expect for the regime of space charge limited currents. |
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| Date |
2017-12-31T16:37:26Z
2017-12-31T16:37:26Z 2015 |
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| Type |
Article
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| Identifier |
Nanotube-based source of charges for experiments with solid helium at low temperatures
/ D.N. Borisenko1, P.M. Walmsley, A.I. Golov, N.N. Kolesnikov, Yu.V. Kotov, A.A. Levchenko, L.P. Mezhov-Deglin, M.J. Fear // Физика низких температур. — 2015. — Т. 41, № 7. — С. 729–732. — Бібліогр.: 11 назв. — англ.
0132-6414 PACS: 67.80.B– http://dspace.nbuv.gov.ua/handle/123456789/127955 |
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| Language |
en
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| Relation |
Физика низких температур
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| Publisher |
Фізико-технічний інститут низьких температур ім. Б.І. Вєркіна НАН України
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