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Dominant channels of exciton spin relaxation in photoexcited self-assembled (In,Ga)As quantum dots
dc.contributor.author | Liao, Yu-Huai | |
dc.contributor.author | Climente, Juan I. | |
dc.contributor.author | Cheng, Shun-Jen | |
dc.date.accessioned | 2012-05-16T05:59:55Z | |
dc.date.available | 2012-05-16T05:59:55Z | |
dc.date.issued | 2011-04-22 | |
dc.identifier.citation | Physical Review B (2011) vol. 83, no. 16 | ca_CA |
dc.identifier.issn | 1098-0121 | |
dc.identifier.issn | 1550-235X | |
dc.identifier.uri | http://hdl.handle.net/10234/37460 | |
dc.description.abstract | We present a comprehensive theoretical investigation of spin relaxation processes of excitons in photoexcited self-assembled quantum dots. The exciton spin relaxations are considered between dark- and bright-exciton states via the channels created by various spin-admixture mechanisms, including electron Rashba and Dresselhaus spin- orbital couplings (SOCs), hole linear and hole cubic SOCs, and electron hyperfine interactions, incorporated with single- and double-phonon processes. The hole-Dresselhaus SOC is identified as the dominant spin-admixture mechanism, leading to relaxation rates as fast as ∼10−2 ns−1, consistent with recent observations. Moreover, due to significant electron-hole exchange interactions, single-phonon processes are unusually dominant over two-phonon ones in a photoexcited dot even at temperatures as high as 15 K. | ca_CA |
dc.format.extent | 7 p. | ca_CA |
dc.format.mimetype | application/pdf | ca_CA |
dc.language.iso | eng | ca_CA |
dc.publisher | American Physical Society | ca_CA |
dc.rights | © American Physical Society | ca_CA |
dc.rights.uri | http://rightsstatements.org/vocab/InC/1.0/ | * |
dc.subject | Exciton | ca_CA |
dc.subject | Spin | ca_CA |
dc.subject | Quantum dots | ca_CA |
dc.subject | Electron | ca_CA |
dc.subject.lcsh | Exciton theory | ca_CA |
dc.subject.lcsh | Nuclear spin | ca_CA |
dc.subject.lcsh | Quantum dots | ca_CA |
dc.subject.other | Excitons | ca_CA |
dc.subject.other | Spin (Física nuclear) | ca_CA |
dc.subject.other | Punts quàntics | ca_CA |
dc.title | Dominant channels of exciton spin relaxation in photoexcited self-assembled (In,Ga)As quantum dots | ca_CA |
dc.type | info:eu-repo/semantics/article | ca_CA |
dc.identifier.doi | http://dx.doi.org/10.1103/PhysRevB.83.165317 | |
dc.rights.accessRights | info:eu-repo/semantics/openAccess | ca_CA |
dc.relation.publisherVersion | http://link.aps.org/doi/10.1103/PhysRevB.83.165317 | ca_CA |
dc.type.version | info:eu-repo/semantics/publishedVersion |
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