Evidence for dark excitons in a single carbon nanotube due to the Aharonov-Bohm effect
Abstract
We studied exciton structures and the Aharonov-Bohm effect in a single carbon nanotube using micro-photoluminescence (PL) spectroscopy under a magnetic field at low temperatures. A single sharp PL peak from the bright exciton state of a single carbon nanotube was observed under zero magnetic field, and the additional PL of dark exciton state appeared below the bright exciton peak under high magnetic fields. It was found that the split between the bright and dark exciton states is several millielectron volts at zero field. The tube diameter dependence of the splitting arises from the intervalley short-range Coulomb interaction.
Journal
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- Physical Review Letters
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Physical Review Letters 101 (14), 2008-10
American Physical Society
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Details 詳細情報について
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- CRID
- 1050282677275609856
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- NII Article ID
- 120001682376
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- ISSN
- 00319007
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- HANDLE
- 2433/87345
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- Text Lang
- en
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- Article Type
- journal article
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- Data Source
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- IRDB
- CiNii Articles
- KAKEN