âThe Private Rooms and Public Hauntsâ

Pettersson, Lin Elinor

doi:10.1057/9781137035189.0009

Cited by 3 publications

(3 citation statements)

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“…This behavior is qualitatively similar to the excitons in quantum dots. Note that those blue shifts are observed in a recent experiment 38 .…”

Section: Numerical Results and Discussionsupporting

confidence: 72%

Aharonov-Bohm effect of excitons in nanorings

Zhu

et al. 2001

Phys. Rev. B

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The magnetic field effects on excitons in an InAs nano-ring are studied theoretically. By numerically diagonalizing the effective-mass Hamiltonian of the problem, which can be separated into terms in centre-of-mass and relative coordinates, we calculate the low-lying exciton energy levels and oscillator strengths as a function of the width of the ring and the strength of the external magnetic field. The analytical results are obtained for a narrow-width nano-ring in which the radial motion is the fastest one and adiabatically decoupled from the azimuthal motions. It is shown that in the presence of Coulomb correlation, the so called Aharonov-Bohm effect of excitons exists in a finite (but small) width nano-ring. However, when the ring width becomes large, the non-simply-connected geometry of nano-rings is destroyed and in turn yields the suppression of Aharonov-Bohm effect. The conditional probability distribution calculated for the low-lying exction states allows identification of the presence of Aharonov-Bohm effect. The linear optical susceptibility is also calculated as a function of the magnetic field, to be confronted with the future measurements of optical emission experiments on InAs nano-rings.

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“…This behavior is qualitatively similar to the excitons in quantum dots. Note that those blue shifts are observed in a recent experiment 38 .…”

Section: Numerical Results and Discussionsupporting

confidence: 72%

Aharonov-Bohm effect of excitons in nanorings

Zhu

et al. 2001

Phys. Rev. B

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“…In the calculations of O 1s core excitation the oxygen at the ionization site is described by an IGLO-III basis [37] in order to obtain a reliable description of inner shell relaxation effects. The other oxygen centers in the cluster are described by an effective core potential (ECP) [38] together with a [5s4p1d] valence basis to avoid explicit mixing of 1s orbitals of different oxygen centers with that of the ionization site. This approximation has proven to introduce only negligible errors in the computed excitation spectrum [39].…”

Section: Computational Detailsmentioning

confidence: 99%

Ab initio DFT cluster studies of angle-resolved NEXAFS spectra for differently coordinated oxygen at the V2O5(010) surface

Kolczewski

Hermann

2004

Surface Science

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“…The main discrepancy between the present theory and experiment occurs at high photon energy 1.4 eV, where the experimental curve displays a steep increase, while the theory predicts no variation. This discrepancy can be attributed to the increasing contribution from the wetting layer [23]. The small split of the rightmost peak is somewhat of a biasing artifact due to the unknown ratio of the contributions of the heavy hole and light hole excitons.…”

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confidence: 99%

Low-energy exciton states in a nanoscopic semiconducting ring

Zhang

Zhu

et al. 2001

Phys. Rev. B

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We consider an effective mass model for an electron-hole pair in a simplified confinement potential, which is applicable to both a nanoscopic self-assembled semiconducting InAs ring and a quantum dot. The linear optical susceptibility, proportional to the absorption intensity of near-infrared transmission, is calculated as a function of the ring radius R0. Compared with the properties of the quantum dot corresponding to the model with a very small radius R0, our results are in qualitative agreement with the recent experimental measurements by Pettersson et al.

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âThe Private Rooms and Public Hauntsâ

Cited by 3 publications

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Aharonov-Bohm effect of excitons in nanorings

Aharonov-Bohm effect of excitons in nanorings

Ab initio DFT cluster studies of angle-resolved NEXAFS spectra for differently coordinated oxygen at the V2O5(010) surface

Low-energy exciton states in a nanoscopic semiconducting ring

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âThe Private Rooms and Public Hauntsâ

Cited by 3 publications

References 0 publications

Aharonov-Bohm effect of excitons in nanorings

Aharonov-Bohm effect of excitons in nanorings

Ab initio DFT cluster studies of angle-resolved NEXAFS spectra for differently coordinated oxygen at the V2O5(010) surface

Low-energy exciton states in a nanoscopic semiconducting ring

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âThe Private Rooms and Public Hauntsâ