UNCORRECTED PROOF YSPMI: 1213 pp. 1–6 (col. fig: NIL) ARTICLE IN PRESS Superlattices and Microstructures xx (xxxx) xxx–xxx www.elsevier.com/locate/jnlabr/yspmi Interband magneto-optics in single-walled carbon nanotubes S. Zaric a , G.N. Ostojic a , A.D. Engroff a , J. Kono a,∗ , J. Shaver b , V.C. Moore b , M.S. Strano b , R.H. Hauge b , R.E. Smalley b , X. Wei c a Department of Electrical and Computer Engineering, Rice University, Houston, TX 77005, USA b Department of Chemistry, Rice University, Houston, TX 77005, USA c National High Magnetic Field Laboratory, Tallahassee, FL 32310, USA Abstract 1 We have carried out magneto-absorption and magneto-photoluminescence experiments on 2 micelle-suspended single-walled carbon nanotubes in magnetic fields up to 45 T. Chirality-assigned 3 spectral peaks exhibit significant changes with increasing magnetic field, which can be quantitatively 4 explained in terms of the theoretically predicted splittings and redshifts of the band edge due to the 5 Aharonov–Bohm effect combined with the magnetic-field-induced alignment of the nanotubes. 6 © 2003 Elsevier Ltd. All rights reserved. 7 The properties of a single-walled carbon nanotube (SWNT) sensitively depend on the 8 chirality vector C h = (n, m) [1]. When n - m = 3 M + ν( M: integer,ν =±1), 9 the nanotubes are direct-gap semiconductors with promising optical properties. However, 10 early optical experiments did not reveal any chirality-dependent features, presumably 11 due to their affinity to stick together to form bundles [2]. Recent success in preparing 12 unbundled SWNTs in aqueous solutions led to the observation of peaks in absorption 13 and photoluminescence (PL) spectra and to complete chirality assignments [3]. This has 14 opened ways to perform spectroscopy of SWNTs of specific chiralities. 15 One of the experimentally unexplored aspects is the influence of a magnetic field ( B ) on 16 a nanotube’s electronic structure through the Aharonov–Bohm effect [4]. In an interesting 17 interplay with a nanotube’s zero-field electronic structure, B parallel to the tube axis is 18 ∗ Corresponding author. Tel.: +1-713-348-2209; fax: +1-713-348-5686. E-mail address: kono@rice.edu (J. Kono). 0749-6036/$ - see front matter © 2003 Elsevier Ltd. All rights reserved. doi:10.1016/j.spmi.2004.03.060