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Band-edge exciton states in a single-walled carbon nanotube revealed by magneto-optical spectroscopy in ultrahigh magnetic fields

Weihang Zhou, Tatsuya Sasaki, Daisuke Nakamura, Huaping Liu, Hiromichi Kataura, and Shojiro Takeyama
Phys. Rev. B 87, 241406(R) – Published 20 June 2013

Abstract

We report a high-field magneto-optical study on first and second subband transitions of single-chirality single-walled carbon nanotubes. The ordering and relative energy splitting between bright and dark excitonic states were found to be inverse between the first and second subbands. We verified that the zero-momentum dark singlet exciton lies below the bright exciton for the first subband transitions, while for the second subband transitions, it was found to have higher energy than the bright excitonic state. The effect of this peculiar excitonic structure was found to manifest itself in distinctive Aharonov-Bohm splitting in ultrahigh magnetic fields up to 190 T.

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  • Received 3 April 2013

DOI:https://doi.org/10.1103/PhysRevB.87.241406

©2013 American Physical Society

Authors & Affiliations

Weihang Zhou1, Tatsuya Sasaki1,2, Daisuke Nakamura1, Huaping Liu3,4, Hiromichi Kataura3,4, and Shojiro Takeyama1,*

  • 1The Institute for Solid State Physics, The University of Tokyo, 5-1-5, Kashiwanoha, Kashiwa, Chiba 277-8581, Japan
  • 2Department of Applied Physics, The University of Tokyo, Hongo 113-8656, Japan
  • 3Nanosystem Research Institute, National Institute of Advanced Industrial Science and Technology, Tsukuba, Ibaraki 305-8562, Japan
  • 4Japan Science and Technology Agency, CREST, Kawaguchi, Saitama 330-0012, Japan

  • *takeyama@issp.u-tokyo.ac.jp

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Issue

Vol. 87, Iss. 24 — 15 June 2013

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