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arXiv · 1103.1459

Observation of the Meissner state in superconducting arrays of 4-{\AA}ngstrom carbon nanotubes

Chao Ieong·Zhe Wang·Wu Shi·Yuxing Wang·Ning Wang·Zikang Tang·Ping Sheng·Rolf Lortz
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Abstract

We report clear observations of the magnetic Meissner effect in arrays of superconducting 4 {\AA} carbon nanotubes grown in the linear channels of AlPO4-5 (AFI) zeolite single crystals. Both bulk magnetization and magnetic torque experiments show a clear signature of the lower critical Hc1 transition, a pronounced difference in zero-field cooled and field cooled branches during temperature sweeps below 6K, and signatures of 1D superconducting fluctuations below ~15-18 K. These experiments extend the magnetic phase diagram we obtained previously by resistive experiments [Z. Wang et al., Phys. Rev. B 81, 174530 (2010)] towards low magnetic fields and within the range of zero resistance.

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Chao Ieong, Zhe Wang, Wu Shi, Yuxing Wang, Ning Wang, Zikang Tang, Ping Sheng, Rolf Lortz. 2011-03-08. Observation of the Meissner state in superconducting arrays of 4-{\AA}ngstrom carbon nanotubes. https://doi.org/10.1103/physrevb.83.184512

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