Session T41: Focus Session: Search for New Superconductors - Nanotubes and Fullerides
2:30 PM–5:18 PM, Wednesday, March 17, 2010
Room: F152
Sponsoring Unit:
DMP
Chair: Anvar Zakhidov, University of Texas at Dallas
Abstract ID: BAPS.2010.MAR.T41.10
Abstract: T41.00010 : Pressure-induced superconductivity in thin films of boron-doped carbon nanotubes
5:06 PM–5:18 PM
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Abstract
Authors:
Junji Haruyama
(Aoyama Gakuin Univ.)
Jin Nakamura
(Aoyama Gakuin Univ.)
Jason Reppert
(Clemson Univ.)
Apparao Rao
(Clemson Univ.)
Hirotaka Sano
(Tokyo University)
Yasuhiro Iye
(Tokyo university)
We have reported that thin films of slightly boron-doped single-walled carbon nanotubes (B-SWNTs) can be superconductor at Tc of 12K [1]. Here, based on this, we show creation of paperlike thin film (Buckypaper) consisting of pseudo-two-dimensional network of B-SWNTs within weakly intertube van der Waals coupling (IVDWC) state. It was formed by sufficiently dissolving as-grown ropes of B-SWNTs and densely assembling them on silicon substrate. We find that superconducting transition temperature Tc of 8 K under absent pressure can be induced up to 19 K by applying a small pressure to the film and that a frequency in the radial breathing phonon drastically increases with applying pressure [2]. Discussion about IVDWC and distribution of B-SWNTs diameter imply the strong correlation. References [1] N. Murata, J. Haruyama, J. Reppert, A. M. Rao, T. Koretsune, S. Saito, Phys. Rev. Lett. 101, 027002 (2008) [2] J. Nakamura, J. Haruyama, M. Tachibana, J. Reppert,A. Rao, H. Sano, Y. Iye et al., Appl.Phys.Lett. 95, 142503 (2009)
To cite this abstract, use the following reference: http://meetings.aps.org/link/BAPS.2010.MAR.T41.10