Utilize este identificador para referenciar este registo:
https://hdl.handle.net/1822/5461
Registo completo
Campo DC | Valor | Idioma |
---|---|---|
dc.contributor.author | Vasilevskiy, Mikhail | - |
dc.date.accessioned | 2006-08-23T15:03:53Z | - |
dc.date.available | 2006-08-23T15:03:53Z | - |
dc.date.issued | 2002 | - |
dc.identifier.citation | "Physical Review B (Condensed Matter)". ISSN 0163-1829. 66 (2002) 195326:1-195326:9 | eng |
dc.identifier.issn | 0163-1829 | eng |
dc.identifier.uri | https://hdl.handle.net/1822/5461 | - |
dc.description.abstract | Spatially quantized dipolar phonon modes in a spherical quantum dot ~QD! made of a polar isotropic material are considered in the framework of a continnum model. Different mechanical boundary conditions are analyzed, which are shown to strongly influence the spectrum of the dipole-active modes. The phonon-related polarizability of a single QD and an average dielectric function of a composite containing QDs are calculated. Numerical results are presented for CdSe and InP dots. A strongly dipole-active gap mode is predicted for InP QDs embedded in a matrix with a defined range of dielectric constant. The effect of increasing QD concentration in ensembles is discussed in terms of the dipole–dipole interaction between the dots, which can result in their bulk-like FIR absorption spectra with a peak at the transverse optical ~TO! phonon frequency instead of the Fro¨hlich frequency. It is suggested that similar effects might occur in individual microcrystals, which can explain their absorbtion of FIR radiation at the TO phonon frequency, despite having a size much smaller than the radiation wavelength. | eng |
dc.description.sponsorship | Fundação para a Ciência e a Tecnologia(FCT) | por |
dc.language.iso | eng | eng |
dc.publisher | American Physical Society | eng |
dc.rights | openAccess | eng |
dc.subject | Phonons | eng |
dc.subject | Quantum dots | eng |
dc.subject | Lattice dynamics | eng |
dc.subject | Dielectric function | eng |
dc.subject | FIR spectroscopy | eng |
dc.title | Dipolar vibrational modes in spherical semiconductor quantum dots | eng |
dc.type | article | por |
dc.peerreviewed | yes | por |
sdum.pagination | 195326 | eng |
sdum.publicationstatus | published | eng |
sdum.volume | 66 | eng |
oaire.citationStartPage | 1953261 | por |
oaire.citationEndPage | 1953269 | por |
oaire.citationIssue | 19 | por |
oaire.citationVolume | 66 | por |
dc.identifier.doi | 10.1103/PhysRevB.66.195326 | por |
dc.subject.wos | Science & Technology | por |
sdum.journal | Physical Review B (Condensed Matter) | por |
Aparece nas coleções: | CDF - CEP - Artigos/Papers (with refereeing) CDF - FMNC - Artigos/Papers (with refereeing) |
Ficheiros deste registo:
Ficheiro | Descrição | Tamanho | Formato | |
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PRB2002.pdf | Documento principal | 196,67 kB | Adobe PDF | Ver/Abrir |
Erratum_PRB2002.pdf | Erratum | 32,78 kB | Adobe PDF | Ver/Abrir |