Superconducting characteristics of 4-angstrom carbon nanotube-zeolite composite

Rolf Lortza; Qiucen Zhang; Wu Shi; Jiang Ting Ye; Chunyin Qiu; Zhe Wang; Hongtao He; Ping Sheng; Tiezheng Qian; Zikang Tang; Ning Wang; Xixiang Zhang; Jiannong Wang; Che Ting Chan

doi:10.1073/pnas.0813162106

Superconducting characteristics of 4-angstrom carbon nanotube-zeolite composite

Rolf Lortza, Qiucen Zhang, Wu Shi, Jiang Ting Ye, Chunyin Qiu, Zhe Wang, Hongtao He, Ping Sheng^*, Tiezheng Qian, Zikang Tang, Ning Wang, Xixiang Zhang, Jiannong Wang, Che Ting Chan

^*Corresponding author for this work

Research output: Contribution to journal › Article › Academic › peer-review

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Abstract

We have fabricated nanocomposites consisting of 4-angstrom 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> 2 T, 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 mu m. 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 5 T or beyond.

Original language	English
Pages (from-to)	7299-7303
Number of pages	5
Journal	Proceedings of the National Academy of Science of the United States of America
Volume	106
Issue number	18
DOIs	https://doi.org/10.1073/pnas.0813162106
Publication status	Published - 5-May-2009
Externally published	Yes

Keywords

resistance transition
specific heat
superconductivity
PEIERLS-TRANSITION
TEMPERATURE

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Lortza, R., Zhang, Q., Shi, W., Ye, J. T., Qiu, C., Wang, Z., He, H., Sheng, P., Qian, T., Tang, Z., Wang, N., Zhang, X., Wang, J., & Chan, C. T. (2009). Superconducting characteristics of 4-angstrom carbon nanotube-zeolite composite. Proceedings of the National Academy of Science of the United States of America, 106(18), 7299-7303. https://doi.org/10.1073/pnas.0813162106

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title = "Superconducting characteristics of 4-angstrom carbon nanotube-zeolite composite",

abstract = "We have fabricated nanocomposites consisting of 4-angstrom 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> 2 T, 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 mu m. 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 5 T or beyond.",

keywords = "resistance transition, specific heat, superconductivity, PEIERLS-TRANSITION, TEMPERATURE",

author = "Rolf Lortza and Qiucen Zhang and Wu Shi and Ye, {Jiang Ting} and Chunyin Qiu and Zhe Wang and Hongtao He and Ping Sheng and Tiezheng Qian and Zikang Tang and Ning Wang and Xixiang Zhang and Jiannong Wang and Chan, {Che Ting}",

year = "2009",

month = may,

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doi = "10.1073/pnas.0813162106",

language = "English",

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TY - JOUR

T1 - Superconducting characteristics of 4-angstrom carbon nanotube-zeolite composite

AU - Lortza, Rolf

AU - Zhang, Qiucen

AU - Shi, Wu

AU - Ye, Jiang Ting

AU - Qiu, Chunyin

AU - Wang, Zhe

AU - He, Hongtao

AU - Sheng, Ping

AU - Qian, Tiezheng

AU - Tang, Zikang

AU - Wang, Ning

AU - Zhang, Xixiang

AU - Wang, Jiannong

AU - Chan, Che Ting

PY - 2009/5/5

Y1 - 2009/5/5

N2 - We have fabricated nanocomposites consisting of 4-angstrom 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> 2 T, 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 mu m. 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 5 T or beyond.

AB - We have fabricated nanocomposites consisting of 4-angstrom 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> 2 T, 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 mu m. 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 5 T or beyond.

KW - resistance transition

KW - specific heat

KW - superconductivity

KW - PEIERLS-TRANSITION

KW - TEMPERATURE

U2 - 10.1073/pnas.0813162106

DO - 10.1073/pnas.0813162106

M3 - Article

SN - 0027-8424

VL - 106

SP - 7299

EP - 7303

JO - Proceedings of the National Academy of Science of the United States of America

JF - Proceedings of the National Academy of Science of the United States of America

IS - 18

ER -

Superconducting characteristics of 4-angstrom carbon nanotube-zeolite composite

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