메뉴 건너뛰기




Volumn 90, Issue 18, 2003, Pages

Optical detection of the Aharonov-Bohm effect on a charged particle in a nanoscale quantum ring

Author keywords

[No Author keywords available]

Indexed keywords

ELECTRON EMISSION; ELECTRON TRANSITIONS; ELECTRONIC STRUCTURE; EXCITONS; MAGNETIC FIELD EFFECTS; NANOSTRUCTURED MATERIALS; OSCILLATIONS; PHOTOLUMINESCENCE; QUANTUM THEORY; SEMICONDUCTOR MATERIALS; SPECTROSCOPIC ANALYSIS;

EID: 0038271825     PISSN: 00319007     EISSN: None     Source Type: Journal    
DOI: None     Document Type: Article
Times cited : (218)

References (29)
  • 10
    • 0038587924 scopus 로고    scopus 로고
    • cond-mat/0206262
    • U. F. Keyser et al., cond-mat/0206262.
    • Keyser, U.F.1
  • 15
    • 0037573817 scopus 로고    scopus 로고
    • note
    • Only some modulated barrier rings exhibited diamagnetic shifts, which are large compared to ring segments. For other structures, small shifts were found indicating strong localization, which always is observed in deep-etched [6] rings. Signatures of AB oscillations are found then neither for neutral nor for charged excitons.
  • 16
    • 0038249341 scopus 로고    scopus 로고
    • note
    • Because of close-by surfaces at which fluctuating charge distributions are created by laser illumination, the spectral lines are quite broad (∼0.4 meV) compared to self-assembled dots/rings.
  • 17
    • 0038249339 scopus 로고    scopus 로고
    • note
    • This line cannot be attributed to biexcitonic recombination, as it is observed also at excitation powers at which the average carrier population is clearly below unity.
  • 18
    • 0037573818 scopus 로고    scopus 로고
    • note
    • The diamagnetic shifts of charged and neutral excitons are comparable. This result is not yet fully understood, since such a behavior would be expected for a strongly confined system with negligible Coulomb correlations only. For systems of rather weak confinement even negative diamagnetic shifts have been predicted [12].
  • 23
    • 0034906804 scopus 로고    scopus 로고
    • H. Hu et al., Phys. Rev. B 63, 195307 (2001).
    • (2001) Phys. Rev. B , vol.63 , pp. 195307
    • Hu, H.1
  • 24
    • 0038587922 scopus 로고    scopus 로고
    • note
    • In our model, AB oscillations of the charge neutral exciton with amplitudes much smaller as for the trion occur for weak electron-hole interaction, i.e., strong confinement. These oscillations are quickly smeared out when the interaction cannot be neglected [15].
  • 26
    • 0037573814 scopus 로고    scopus 로고
    • note
    • The exciton does become sensitive to magnetic flux if it has a dipole momentum as for confinement in type-II quantum dots/rings, in which the electron-hole pair is radially polarized. Such structures might be obtained by a proper choice of heterostructure materials or applying an electric field in the radial direction [17].
  • 29
    • 0038587923 scopus 로고    scopus 로고
    • note
    • This assumption is justified by the different energy scales involved in radial and azimuthal quantization, since the ring width is much smaller than its circumference.


* 이 정보는 Elsevier사의 SCOPUS DB에서 KISTI가 분석하여 추출한 것입니다.