UM
Superconducting characteristics of 4-Å carbon nanotube-zeolite composite
Lortz R.2; Zhang Q.2; Shi W.2; Ye J.T.2; Qiu C.3; Wang Z.2; He H.2; Sheng P.2; Qian T.3; Tang Z.2; Wang N.2; Zhang X.2; Wang J.2; Chan C.T.2
2009-05-05
Source PublicationProceedings of the National Academy of Sciences of the United States of America
ISSN00278424 10916490
Volume106Issue:18Pages:7299-7303
AbstractWe have fabricated nanocomposites consisting of 4-A carbon nanotubes embedded in the 0.7-nm pores of aluminophosphate- five (AFI) zeolite that display a superconducting specific heat transition at 15 K. MicroRaman spectra of the samples show strong and spatially uniform radial breathing mode (RBM) signals at 510 cm and 550 cm , characteristic of the (4,2) and (5,0) nanotubes, respectively. The specific heat transition is suppressed at >2T, with a temperature dependence characteristic of finite-size effects. Comparison with theory shows the behavior to be consistent with that of a type II BCS superconductor, characterized by a coherence length of 14 ± 2 nm and a magnetic penetration length of 1.5 ± 0.7 μm. Four probe and differential resistance measurements have also indicated a superconducting transition initiating at 15 K, but the magnetoresistance data indicate the superconducting network to be inhomogeneous, with a component being susceptible to magnetic fields below 3 T and other parts capable of withstanding a magnetic field of 5Tor beyond.
KeywordResistance transition Specific heat Superconductivity
DOI10.1073/pnas.0813162106
URLView the original
Language英語
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Cited Times [WOS]:49   [WOS Record]     [Related Records in WOS]
Document TypeJournal article
CollectionUniversity of Macau
Affiliation1.King Abdullah University of Science and Technology
2.Hong Kong University of Science and Technology, William Mong Institute of Nano Science & Technology
3.Hong Kong University of Science and Technology
4.Université de Genève
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Lortz R.,Zhang Q.,Shi W.,et al. Superconducting characteristics of 4-Å carbon nanotube-zeolite composite[J]. Proceedings of the National Academy of Sciences of the United States of America,2009,106(18):7299-7303.
APA Lortz R..,Zhang Q..,Shi W..,Ye J.T..,Qiu C..,...&Chan C.T..(2009).Superconducting characteristics of 4-Å carbon nanotube-zeolite composite.Proceedings of the National Academy of Sciences of the United States of America,106(18),7299-7303.
MLA Lortz R.,et al."Superconducting characteristics of 4-Å carbon nanotube-zeolite composite".Proceedings of the National Academy of Sciences of the United States of America 106.18(2009):7299-7303.
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