Observation of the Meissner state in superconducting arrays of 4-Ångstrom carbon nanotubes
arXiv:1103.1459 · doi:10.1103/PhysRevB.83.184512
Abstract
We report clear observations of the magnetic Meissner effect in arrays of superconducting 4 Å 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.
arXiv comment15 pages, 9 figures
References in corpus (10)
- Superconductivity in diamond
- Superconductivity in the Intercalated Graphite Compounds C6Yb and C6Ca
- Superconductivity in CVD Diamond Thin Film Well-Above Liquid Helium Temperature
- Calorimetric Evidence for a Fulde-Ferrell-Larkin-Ovchinnikov Superconducting State in the Layered Organic Superconductor κ_2_2$
- Phase fluctuations and the pseudogap in YBa2Cu3Ox
- Phonon Mode Spectroscopy, Electron-Phonon Coupling and the Metal-Insulator Transition in Quasi-One-Dimensional M2Mo6Se6
- Josephson vortices and solitons inside pancake vortex lattice in layered superconductors
- Magnetic-field-induced finite-size effect in the high-temperature superconductor YBa2Cu3O7-a comparison to rotating superfluid 4 He
- Renormalization-group theory for rotating 4He near the superfluid transition
- 1D goes 2D: A Kosterlitz Thouless transition in superconducting arrays of 4-Angstrom carbon nanotubes