Spin–orbit-induced hole spin relaxation in InAs and GaAs quantum dots
We study the effect of valence band spin–orbit interactions (SOI) on the acoustic phonon-assisted spin relaxation of holes confined in quantum dots (QDs). Heavy hole–light hole (hh–lh) mixing and all the spin–orbit terms arising from zinc-blende bulk inversion asymmetry (BIA) are considered on equal...
| Main Authors: | , , |
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| Format: | Article |
| Language: | English |
| Published: |
IOP Publishing
2013-01-01
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| Series: | New Journal of Physics |
| Online Access: | https://doi.org/10.1088/1367-2630/15/9/093009 |
| _version_ | 1827874150018973696 |
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| author | J I Climente C Segarra J Planelles |
| author_facet | J I Climente C Segarra J Planelles |
| author_sort | J I Climente |
| collection | DOAJ |
| description | We study the effect of valence band spin–orbit interactions (SOI) on the acoustic phonon-assisted spin relaxation of holes confined in quantum dots (QDs). Heavy hole–light hole (hh–lh) mixing and all the spin–orbit terms arising from zinc-blende bulk inversion asymmetry (BIA) are considered on equal footing in a fully three-dimensional Hamiltonian. We show that hh–lh mixing and BIA have comparable contributions to the hole spin relaxation in self-assembled QDs, but BIA becomes dominant in gated QDs. Simultaneously accounting for both mechanisms is necessary for quantitatively correct results in quasi-two-dimensional QDs. The dependence of the hole spin relaxation on the QD geometry and spin splitting energy is drastically different from that of electrons, with a non-monotonic behavior which results from the interplay between SOI terms. Our results reconcile contradictory predictions of previous theoretical works and are consistent with experiments. |
| first_indexed | 2024-03-12T16:48:06Z |
| format | Article |
| id | doaj.art-f31202332fd7422a817bd199fbb5d5fe |
| institution | Directory Open Access Journal |
| issn | 1367-2630 |
| language | English |
| last_indexed | 2024-03-12T16:48:06Z |
| publishDate | 2013-01-01 |
| publisher | IOP Publishing |
| record_format | Article |
| series | New Journal of Physics |
| spelling | doaj.art-f31202332fd7422a817bd199fbb5d5fe2023-08-08T11:30:15ZengIOP PublishingNew Journal of Physics1367-26302013-01-0115909300910.1088/1367-2630/15/9/093009Spin–orbit-induced hole spin relaxation in InAs and GaAs quantum dotsJ I Climente0C Segarra1J Planelles2Departament de Química Física i Analítica, Universitat Jaume I , Box 224, E-12080 Castelló, SpainDepartament de Química Física i Analítica, Universitat Jaume I , Box 224, E-12080 Castelló, SpainDepartament de Química Física i Analítica, Universitat Jaume I , Box 224, E-12080 Castelló, SpainWe study the effect of valence band spin–orbit interactions (SOI) on the acoustic phonon-assisted spin relaxation of holes confined in quantum dots (QDs). Heavy hole–light hole (hh–lh) mixing and all the spin–orbit terms arising from zinc-blende bulk inversion asymmetry (BIA) are considered on equal footing in a fully three-dimensional Hamiltonian. We show that hh–lh mixing and BIA have comparable contributions to the hole spin relaxation in self-assembled QDs, but BIA becomes dominant in gated QDs. Simultaneously accounting for both mechanisms is necessary for quantitatively correct results in quasi-two-dimensional QDs. The dependence of the hole spin relaxation on the QD geometry and spin splitting energy is drastically different from that of electrons, with a non-monotonic behavior which results from the interplay between SOI terms. Our results reconcile contradictory predictions of previous theoretical works and are consistent with experiments.https://doi.org/10.1088/1367-2630/15/9/093009 |
| spellingShingle | J I Climente C Segarra J Planelles Spin–orbit-induced hole spin relaxation in InAs and GaAs quantum dots New Journal of Physics |
| title | Spin–orbit-induced hole spin relaxation in InAs and GaAs quantum dots |
| title_full | Spin–orbit-induced hole spin relaxation in InAs and GaAs quantum dots |
| title_fullStr | Spin–orbit-induced hole spin relaxation in InAs and GaAs quantum dots |
| title_full_unstemmed | Spin–orbit-induced hole spin relaxation in InAs and GaAs quantum dots |
| title_short | Spin–orbit-induced hole spin relaxation in InAs and GaAs quantum dots |
| title_sort | spin orbit induced hole spin relaxation in inas and gaas quantum dots |
| url | https://doi.org/10.1088/1367-2630/15/9/093009 |
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