Electron spin resonance from semiconductor-metal separated SWCNTs

Autor(en)

Marek Havlicek, Wolfgang Jantsch, Mark Rümmeli, Ronny Schönfelder, Kazuhiro Yanagi, Yasumitsu Miyata, Hiromichi Kataura, Ferenc Simon, Herwig Peterlik, Hans Kuzmany

Abstrakt

Electron spin resonance in the X band is reported for fully metal–semiconductor separated SWCNTs. For the experiments samples were immersed in ethanol or wrapped into a teflon foil. The response from the metallic tubes exhibits a strong asymmetry in the line shape whereas the asymmetry for the semiconducting (SC) tubes is comparatively small. In both cases the line widths are unusual small, of the order of 4G. Particular attention is paid to SC nanotubes which exhibit a much stronger signal as compared to the metallic tubes. The signal intensity is nearly Curie like with a small enhancement beyond 1=T in the low temperature range. The 1=T behavior renders the ESR response unobservable at 300 K. The finite value for the asymmetry parameter in the SC tubes is assumed to originate from charges picked up during exposure to air or to

ethanol.

Organisation(en)

Elektronische Materialeigenschaften, Dynamik Kondensierter Systeme

Externe Organisation(en)

Johannes Kepler Universität Linz, Leibniz-Institut für Festkörper- und Werkstoffforschung Dresden, Tokyo Metropolitan University, Nagoya University, National Institute of Advanced Industrial Science and Technology (AIST)

Journal

Physica Status Solidi. B: Basic Research

Band

247

Seiten

2851-2854

Anzahl der Seiten

4

ISSN

0370-1972

DOI

https://doi.org/10.1002/pssb.201000317

Publikationsdatum

2010

Peer-reviewed

Ja

ÖFOS 2012

1030 Physik, Astronomie

Link zum Portal

https://ucris.univie.ac.at/portal/de/publications/electron-spin-resonance-from-semiconductormetal-separated-swcnts(c6ccf295-ab43-4972-b8bd-32ca662edd27).html