Superconducting characteristics of 4-Å carbon nanotube-zeolite composite

Handle URI:
http://hdl.handle.net/10754/561393
Title:
Superconducting characteristics of 4-Å carbon nanotube-zeolite composite
Authors:
Lortz, Rolf W.; Zhang, Qiucen; Shi, Wu; Ye, JiangTing; Qiu, Chunyin; Wang, Zhe; He, Hongtao; Sheng, Ping; Qian, Tiezheng; Tang, Zikang; Wang, Ning; Zhang, Xixiang ( 0000-0002-3478-6414 ) ; Wang, Jiannong; Chan, Cheting
Abstract:
We 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.
KAUST Department:
Physical Sciences and Engineering (PSE) Division; Materials Science and Engineering Program
Publisher:
Proceedings of the National Academy of Sciences
Journal:
Proceedings of the National Academy of Sciences
Issue Date:
15-Apr-2009
DOI:
10.1073/pnas.0813162106
PubMed ID:
19369206
PubMed Central ID:
PMC2678622
Type:
Article
ISSN:
00278424
Additional Links:
http://www.ncbi.nlm.nih.gov/pmc/articles/PMC2678622
Appears in Collections:
Articles; Physical Sciences and Engineering (PSE) Division; Materials Science and Engineering Program

Full metadata record

DC FieldValue Language
dc.contributor.authorLortz, Rolf W.en
dc.contributor.authorZhang, Qiucenen
dc.contributor.authorShi, Wuen
dc.contributor.authorYe, JiangTingen
dc.contributor.authorQiu, Chunyinen
dc.contributor.authorWang, Zheen
dc.contributor.authorHe, Hongtaoen
dc.contributor.authorSheng, Pingen
dc.contributor.authorQian, Tiezhengen
dc.contributor.authorTang, Zikangen
dc.contributor.authorWang, Ningen
dc.contributor.authorZhang, Xixiangen
dc.contributor.authorWang, Jiannongen
dc.contributor.authorChan, Chetingen
dc.date.accessioned2015-08-02T09:10:33Zen
dc.date.available2015-08-02T09:10:33Zen
dc.date.issued2009-04-15en
dc.identifier.issn00278424en
dc.identifier.pmid19369206en
dc.identifier.doi10.1073/pnas.0813162106en
dc.identifier.urihttp://hdl.handle.net/10754/561393en
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.en
dc.publisherProceedings of the National Academy of Sciencesen
dc.relation.urlhttp://www.ncbi.nlm.nih.gov/pmc/articles/PMC2678622en
dc.subjectResistance transitionen
dc.subjectSpecific heaten
dc.subjectSuperconductivityen
dc.titleSuperconducting characteristics of 4-Å carbon nanotube-zeolite compositeen
dc.typeArticleen
dc.contributor.departmentPhysical Sciences and Engineering (PSE) Divisionen
dc.contributor.departmentMaterials Science and Engineering Programen
dc.identifier.journalProceedings of the National Academy of Sciencesen
dc.identifier.pmcidPMC2678622en
dc.contributor.institutionDepartment of Physics, William Mong Institute of Nano Science and Technology, Clear Water Bay, Kowloon, Hong Kongen
dc.contributor.institutionDépartement de Physique de la Matière Condensée, Université de Genève, Quai Ernest-Ansermet 24, 1211 Genève 4, Switzerlanden
dc.contributor.institutionDepartment of Mathematics, Hong Kong University of Science and Technology, Clear Water Bay, Kowloon, Hong Kongen
kaust.authorZhang, Xixiangen

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