Effects of Valley Mixing and Exchange on Excitons in Carbon Nanotubes with Aharonov–Bohm Flux

• Ando Tsuneya

  Department of Physics, Tokyo Institute of Technology

抄録

Because of the presence of two valleys and the electron spin, the exciton states have a degeneracy of 16 in the lowest order k·p approximation. Due to a weak short-range part of the Coulomb interaction, they are split into several levels, leaving only a single optically-active bright level and making all others optically-inactive or dark. Their ordering and energy splitting are shown to be determined by two parameters characterizing the short-range interaction, sensitive to detailed form of the potential and wave function. The presence of a magnetic flux through the cross section, accessible experimentally, modifies these energy levels strongly and causes the appearance of two bright excitons.

収録刊行物

• Ｊｏｕｒｎａｌ　ｏｆ　ｔｈｅ　Ｐｈｙｓｉｃａｌ　Ｓｏｃｉｅｔｙ　ｏｆ　Ｊａｐａｎ

  Ｊｏｕｒｎａｌ　ｏｆ　ｔｈｅ　Ｐｈｙｓｉｃａｌ　Ｓｏｃｉｅｔｙ　ｏｆ　Ｊａｐａｎ 75 (2), 024707-, 2006

  一般社団法人 日本物理学会

キーワード

• carbon nanotube
• Aharonov–Bohm effect
• exciton
• effective-mass theory
• exchange effect
• intervalley mixing

詳細情報

• CRID: 1390282679165532672
• NII論文ID: 110004086883
• NII論文ID: 210000106012
• NII書誌ID: AA00704814
• DOI: 10.1143/jpsj.75.024707
• BIBCODE: 2006JPSJ...75b4707A
• ISSN: 13474073
• ISSN: 00319015
• NDL書誌ID: 7813298
• Web Site: https://ndlsearch.ndl.go.jp/books/R000000004-I7813298
• Web Site: https://journals.jps.jp/doi/pdf/10.1143/JPSJ.75.024707
• 本文言語コード: en
• データソース種別:
  • JaLC
  • NDL
  • Crossref
  • CiNii Articles
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