Exciton-phonon interaction in CdSe and CuCl polar semiconductor nanospheres

Marini, J. C.; Stébé, B.; Kartheuser, E.

doi:10.1103/physrevb.50.14302

Cited by 99 publications

(64 citation statements)

References 42 publications

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“…The electric field within materials correlates to Coulomb interaction with the exciton, and the strength of electron-phonon coupling will be enhanced if the wavelength of the phonon vibration is close to the spatial extent of the exciton. [1][2][3][4][5][6][7][8][9][10][11][12][13] Recently, the fabrication of nanoparticles (NPs) and quantum dots (QDs) makes it possible to investigate the electron-phonon interaction beyond the bulk approximation. Such quantumconfined electronic systems differ completely from their bulk counterparts in the optical and electronic properties.…”

Section: Introductionmentioning

confidence: 99%

Enhanced Resonant Raman Scattering and Electron−Phonon Coupling from Self-Assembled Secondary ZnO Nanoparticles

et al. 2005

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Self-assembled secondary ZnO nanoparticles, recognized with the agglomeration of crystalline subcrystals, are successfully synthesized by a simple sol-gel method. TEM images display that one artificial cluster behaves in a single-crystal-like wurtzite structure because subcrystals coagulate as the same crystal orientation. Moreover, from the resonant Raman scattering, the as-grown sample exhibits phonon red shift; meanwhile, the coupling strength between electron and longitudinal optical phonon, determined by the ratio of secondto first-order Raman scattering cross sections, diminishes compared with the samples after postannealing at 350 and 500°C. The size dependence of electron-phonon coupling is principally as a result of the Fröhlich interaction.

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Section: Introductionmentioning

confidence: 99%

Enhanced Resonant Raman Scattering and Electron−Phonon Coupling from Self-Assembled Secondary ZnO Nanoparticles

et al. 2005

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“…In [33,38] interface-type longitudinal polar optical phonons have no contribution to polaron effects. In [7,30] bulk-type phonons play the dominant role in the polaron energy shift.…”

Section: Introductionmentioning

confidence: 99%

Polaron in Cylindrical and Spherical Quantum Dots

Fai¹,

Teboul²,

Monteil³

et al. 2004

Condens. Matter Phys.

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Polaron states in cylindrical and spherical quantum dots with parabolic confinement potentials are investigated applying the Feynman variational principle. It is observed that for both kinds of quantum dots the polaron energy and mass increase with the increase of Fröhlich electron-phonon coupling constant and confinement frequency. In the case of a spherical quantum dot, the polaron energy for the strong coupling is found to be greater than that of a cylindrical quantum dot. The energy and mass are found to be monotonically increasing functions of the coupling constant and the confinement frequency.

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“…The other group of authors [7,[11][12] have used the approximation of infinitely deep potential well in the media interface, justifying such mathematical simplification by the small difference between electron wave functions in the potential well of infinite and finite depth. Herein, there is not taken into account the shift of the external medium phonons which is rather big for the small radii of a heterosystem and the real shift of interface phonons is essentially smaller as well.…”

Section: Introductionmentioning

confidence: 99%

“…It is known [4] that the main model for studying the electron-phonon interaction in the simplest heterosystems (plane quantum wells [5][6], quantum wires (QW) [7][8] and quantum dots (QD) [9][10][11][12]) is the dielectric continuum model. It gives rather exact results compared to the Huang-Zhu microscopic model [4].…”

Section: Introductionmentioning

confidence: 99%

ELECTRON- AND HOLE-PHONON INTERACTION IN QUANTUM DOT EMBEDDED INTO SEMICONDUCTOR MEDIUM (GaAs/Al_{x}Ga_{1-x}As)

Tkach¹,

Mikhalyova²,

Voitsekhivska³

et al. 2001

Condens. Matter Phys.

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The analytical and numerical calculations of electron and hole spectra renormalised by L-and I-phonons taking into account the configurational interaction are performed for the QD embedded into semiconductor medium exemplified by GaAs/Al x Ga 1−x As nanoheterosystems.It is established that for the nanosize QDs the shifts of electron and hole ground levels are created by the interaction of these quasiparticles with Land I-phonons due to all the states of discrete and continuous spectrum. For the small QDs, the shifts of ground energy levels have strong nonlinear dependences while for the big QDs, they almost do not depend on QD radius and have the magnitude close to the shifts of ground levels in massive crystal creating QD. Due to the different effective masses of light and heavy holes, the splittings of their ground levels are the complicated functions on QD radius and Al concentration in Al x Ga 1−x As medium.

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Exciton-phonon interaction in CdSe and CuCl polar semiconductor nanospheres

Cited by 99 publications

References 42 publications

Enhanced Resonant Raman Scattering and Electron−Phonon Coupling from Self-Assembled Secondary ZnO Nanoparticles

Enhanced Resonant Raman Scattering and Electron−Phonon Coupling from Self-Assembled Secondary ZnO Nanoparticles

Polaron in Cylindrical and Spherical Quantum Dots

ELECTRON- AND HOLE-PHONON INTERACTION IN QUANTUM DOT EMBEDDED INTO SEMICONDUCTOR MEDIUM (GaAs/Al_{x}Ga_{1-x}As)

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