Effects of Nanodomain Formation on the Electronic Structure of Doped Carbon Nanotubes

D. L. Carroll; Ph. Redlich; X. Blase; J.-C. Charlier; S. Curran; P. M. Ajayan; S. Roth; M. Rühle

doi:10.1103/PhysRevLett.81.2332

Effects of Nanodomain Formation on the Electronic Structure of Doped Carbon Nanotubes

D. L. Carroll, Ph. Redlich, X. Blase, J.-C. Charlier, S. Curran, P. M. Ajayan, S. Roth, and M. Rühle

Phys. Rev. Lett. 81, 2332 – Published 14 September 1998

Abstract

Changes in the electronic structure of multiwalled nanotubes due to the introduction of boron in the lattice are identified using scanning tunneling spectroscopy. Doped tubes are metallic with no apparent band gap, in contrast to undoped tubes with varying electronic character. Combined with ab initio calculations, we show that changes in the local density of states, as determined from tunneling spectroscopy, must be interpreted in terms of nanodomains of dopant islands and not as isolated substitutional species.

Received 5 September 1997

DOI:https://doi.org/10.1103/PhysRevLett.81.2332

Authors & Affiliations

D. L. Carroll¹, Ph. Redlich², X. Blase³, J.-C. Charlier⁴, S. Curran⁵, P. M. Ajayan⁷, S. Roth⁶, and M. Rühle²

¹Department of Physics and Astronomy, Clemson University, Clemson, South Carolina 29634
²Max-Planck-Institut für Metallforschung, Seestrasse 92, D-70174 Stuttgart, Germany
³Université Claude Bernard-Lyon I, Départment de Physique des Matériaux, U.M.R. 5586, 43 Boulevard 11 Novembre 1918, 69622 Villeurbanne Cedex, France
⁴Unité de Physico-Chimie et de Physique de Matériaux, Université Catholique de Louvain, Place Croix du Sud 1, B-1348 Louvain-la-Neuve, Belgium
⁵Department of Physics, Trinity College, Dublin 2, Ireland
⁶Max-Planck-Institut für Festkörperforschung, Heisenbergstrasse 1, D-70569 Stuttgart, Germany
⁷Department of Materials Science & Engineering, Rensselaer Polytechnic Institute, Troy, New York 12180-3590