Anisotropy of spin–orbit induced electron spin relaxation in [001] and [111] grown GaAs quantum dots
We report a systematic study of the spin relaxation anisotropy between single electron Zeeman sublevels in three-dimensional cuboidal GaAs quantum dots (QDs). The QDs are subject to an in-plane magnetic field. As the field orientation varies, the relaxation rate oscillates periodically, showing ‘mag...
| Main Authors: | , , , |
|---|---|
| Format: | Article |
| Language: | English |
| Published: |
IOP Publishing
2015-01-01
|
| Series: | New Journal of Physics |
| Subjects: | |
| Online Access: | https://doi.org/10.1088/1367-2630/17/3/033014 |
| _version_ | 1797751183873409024 |
|---|---|
| author | C Segarra J Planelles J I Climente F Rajadell |
| author_facet | C Segarra J Planelles J I Climente F Rajadell |
| author_sort | C Segarra |
| collection | DOAJ |
| description | We report a systematic study of the spin relaxation anisotropy between single electron Zeeman sublevels in three-dimensional cuboidal GaAs quantum dots (QDs). The QDs are subject to an in-plane magnetic field. As the field orientation varies, the relaxation rate oscillates periodically, showing ‘magic’ angles where the relaxation rate is suppressed by several orders of magnitude. This behavior is found in QDs with different shapes, heights, crystallographic orientations and external fields. The origin of these angles can be traced back to the symmetries of the spin admixing terms of the Hamiltonian. Our results evidence that cubic Dresselhaus terms play an important role in determining the spin relaxation anisotropy, which can induce deviations of the ‘magic’ angles from the crystallographic directions reported in recent experiments (P Scarlino et al 2014 Phys. Rev. Lett. http://dx.doi.org/10.1103/PhyRevLett./113/256802 113 http://dx.doi.org/10.1103/PhyRevLett./113/256802 ). |
| first_indexed | 2024-03-12T16:44:47Z |
| format | Article |
| id | doaj.art-b28a3456b89a42bfa457df3a860dd7a8 |
| institution | Directory Open Access Journal |
| issn | 1367-2630 |
| language | English |
| last_indexed | 2024-03-12T16:44:47Z |
| publishDate | 2015-01-01 |
| publisher | IOP Publishing |
| record_format | Article |
| series | New Journal of Physics |
| spelling | doaj.art-b28a3456b89a42bfa457df3a860dd7a82023-08-08T14:18:10ZengIOP PublishingNew Journal of Physics1367-26302015-01-0117303301410.1088/1367-2630/17/3/033014Anisotropy of spin–orbit induced electron spin relaxation in [001] and [111] grown GaAs quantum dotsC Segarra0J Planelles1J I Climente2F Rajadell3Departament de Química Física i Analítica, Universitat Jaume I , Castelló de la Plana, SpainDepartament de Química Física i Analítica, Universitat Jaume I , Castelló de la Plana, SpainDepartament de Química Física i Analítica, Universitat Jaume I , Castelló de la Plana, SpainDepartament de Química Física i Analítica, Universitat Jaume I , Castelló de la Plana, SpainWe report a systematic study of the spin relaxation anisotropy between single electron Zeeman sublevels in three-dimensional cuboidal GaAs quantum dots (QDs). The QDs are subject to an in-plane magnetic field. As the field orientation varies, the relaxation rate oscillates periodically, showing ‘magic’ angles where the relaxation rate is suppressed by several orders of magnitude. This behavior is found in QDs with different shapes, heights, crystallographic orientations and external fields. The origin of these angles can be traced back to the symmetries of the spin admixing terms of the Hamiltonian. Our results evidence that cubic Dresselhaus terms play an important role in determining the spin relaxation anisotropy, which can induce deviations of the ‘magic’ angles from the crystallographic directions reported in recent experiments (P Scarlino et al 2014 Phys. Rev. Lett. http://dx.doi.org/10.1103/PhyRevLett./113/256802 113 http://dx.doi.org/10.1103/PhyRevLett./113/256802 ).https://doi.org/10.1088/1367-2630/17/3/033014spin–orbit interactionspin relaxationquantum dotmagnetic field73.21.La72.25.Rb |
| spellingShingle | C Segarra J Planelles J I Climente F Rajadell Anisotropy of spin–orbit induced electron spin relaxation in [001] and [111] grown GaAs quantum dots New Journal of Physics spin–orbit interaction spin relaxation quantum dot magnetic field 73.21.La 72.25.Rb |
| title | Anisotropy of spin–orbit induced electron spin relaxation in [001] and [111] grown GaAs quantum dots |
| title_full | Anisotropy of spin–orbit induced electron spin relaxation in [001] and [111] grown GaAs quantum dots |
| title_fullStr | Anisotropy of spin–orbit induced electron spin relaxation in [001] and [111] grown GaAs quantum dots |
| title_full_unstemmed | Anisotropy of spin–orbit induced electron spin relaxation in [001] and [111] grown GaAs quantum dots |
| title_short | Anisotropy of spin–orbit induced electron spin relaxation in [001] and [111] grown GaAs quantum dots |
| title_sort | anisotropy of spin orbit induced electron spin relaxation in 001 and 111 grown gaas quantum dots |
| topic | spin–orbit interaction spin relaxation quantum dot magnetic field 73.21.La 72.25.Rb |
| url | https://doi.org/10.1088/1367-2630/17/3/033014 |
| work_keys_str_mv | AT csegarra anisotropyofspinorbitinducedelectronspinrelaxationin001and111growngaasquantumdots AT jplanelles anisotropyofspinorbitinducedelectronspinrelaxationin001and111growngaasquantumdots AT jiclimente anisotropyofspinorbitinducedelectronspinrelaxationin001and111growngaasquantumdots AT frajadell anisotropyofspinorbitinducedelectronspinrelaxationin001and111growngaasquantumdots |