Journal
PHYSICAL REVIEW B
Volume 90, Issue 24, Pages -Publisher
AMER PHYSICAL SOC
DOI: 10.1103/PhysRevB.90.245430
Keywords
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Funding
- DOE [DE-SC0007117]
- U.S. Department of Energy (DOE) [DE-SC0007117] Funding Source: U.S. Department of Energy (DOE)
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A configuration space approach is developed to uncover generic stability peculiarities for the lowest energy neutral and charged exciton complexes (biexciton and trion) in quasi-one-dimensional semiconductors. Trions are shown to be more stable than biexcitons in strongly confined structures with small reduced electron-hole masses. Biexcitons are more stable in less confined structures with large reduced electron-hole masses. In semiconducting carbon nanotubes, in particular, the trion binding energy is shown to be greater than that of the biexciton by a factor of similar to 1.4, decreasing with diameter, thus revealing the general physical principles that underlie recent experimental observations.
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