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dc.contributor.authorLortz, Rolf W.
dc.contributor.authorZhang, Qiucen
dc.contributor.authorShi, Wu
dc.contributor.authorYe, JiangTing
dc.contributor.authorQiu, Chunyin
dc.contributor.authorWang, Zhe
dc.contributor.authorHe, Hongtao
dc.contributor.authorSheng, Ping
dc.contributor.authorQian, Tiezheng
dc.contributor.authorTang, Zikang
dc.contributor.authorWang, Ning
dc.contributor.authorZhang, Xixiang
dc.contributor.authorWang, Jiannong
dc.contributor.authorChan, Cheting
dc.date.accessioned2015-08-02T09:10:33Z
dc.date.available2015-08-02T09:10:33Z
dc.date.issued2009-04-15
dc.identifier.issn00278424
dc.identifier.pmid19369206
dc.identifier.doi10.1073/pnas.0813162106
dc.identifier.urihttp://hdl.handle.net/10754/561393
dc.description.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-1 and 550 cm-1, 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.
dc.publisherProceedings of the National Academy of Sciences
dc.relation.urlhttp://www.ncbi.nlm.nih.gov/pmc/articles/PMC2678622
dc.subjectResistance transition
dc.subjectSpecific heat
dc.subjectSuperconductivity
dc.titleSuperconducting characteristics of 4-Å carbon nanotube-zeolite composite
dc.typeArticle
dc.contributor.departmentCore Labs
dc.contributor.departmentMaterial Science and Engineering Program
dc.contributor.departmentPhysical Science and Engineering (PSE) Division
dc.identifier.journalProceedings of the National Academy of Sciences
dc.identifier.pmcidPMC2678622
dc.contributor.institutionDepartment of Physics, William Mong Institute of Nano Science and Technology, Clear Water Bay, Kowloon, Hong Kong
dc.contributor.institutionDépartement de Physique de la Matière Condensée, Université de Genève, Quai Ernest-Ansermet 24, 1211 Genève 4, Switzerland
dc.contributor.institutionDepartment of Mathematics, Hong Kong University of Science and Technology, Clear Water Bay, Kowloon, Hong Kong
kaust.personZhang, Xixiang
dc.date.published-online2009-04-15
dc.date.published-print2009-05-05


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