|
Письма в Журнал экспериментальной и теоретической физики, 2001, том 73, выпуск 3, страницы 159–162
(Mi jetpl4311)
|
|
|
|
Эта публикация цитируется в 2 научных статьях (всего в 2 статьях)
КОНДЕНСИРОВАННЫЕ СРЕДЫ
Superconducting energy gap in Bi$_2$Sr$_2$Ca$_2$Cu$_3$O$_{10+\delta}$ (Bi2223) single crystals
S. I. Vedeneev, V. A. Stepanov P. N. Lebedev Physical Institute, Russian Academy of Sciences, Moscow
Аннотация:
Current-voltage characteristics of $S{-}I{-}S$ tunnel break junctions fabricated from pure undoped Bi2223 single crystals ($T_c=110$ K) have been measured. High quality of the crystals enables to produce the good tunnel junctions with a low or almost zero leakage current and well developed the gap structure in the tunneling spectra. Values of the peak-to-peak energy gap $ 2\Delta _{p-p}$ in different crystals and tunnel junctions ranged from $80$ to $105$ meV. The tunneling conductance in superconducting state was normalized by that in normal state and compared to a smeared BCS density of states. Simple fit of the data gave average value of the $\Delta =38.5$ meV and reduced gap $2\Delta /kT_c\simeq 8,$ consistent with a very strong coupling mechanism.
Поступила в редакцию: 28.12.2000
Образец цитирования:
S. I. Vedeneev, V. A. Stepanov, “Superconducting energy gap in Bi$_2$Sr$_2$Ca$_2$Cu$_3$O$_{10+\delta}$ (Bi2223) single crystals”, Письма в ЖЭТФ, 73:3 (2001), 159–162; JETP Letters, 73:3 (2001), 141–144
Образцы ссылок на эту страницу:
https://www.mathnet.ru/rus/jetpl4311 https://www.mathnet.ru/rus/jetpl/v73/i3/p159
|
Статистика просмотров: |
Страница аннотации: | 102 | PDF полного текста: | 56 | Список литературы: | 1 |
|