Origin of the decoherence of the extended ...
Document type :
Article dans une revue scientifique
Permalink :
Title :
Origin of the decoherence of the extended electron spin state in Ti-doped β-Ga2O3
Author(s) :
Mentink-Vigier, F [Auteur]
TGE Réseau National de RPE Interdisciplinaire [RENARD]
Laboratoire de Chimie de la Matière Condensée de Paris [LCMCP]
Binet, L [Auteur]
TGE Réseau National de RPE Interdisciplinaire [RENARD]
Laboratoire de Chimie de la Matière Condensée de Paris [LCMCP]
Gourier, D [Auteur]
TGE Réseau National de RPE Interdisciplinaire [RENARD]
Laboratoire de Chimie de la Matière Condensée de Paris [LCMCP]
Laboratoire de Chimie de la Matière Condensée de Paris (site ENSCP) [LCMCP (site ENSCP)]
Vezin, Herve [Auteur]
TGE Réseau National de RPE Interdisciplinaire [RENARD]
Laboratoire Avancé de Spectroscopie pour les Intéractions la Réactivité et l'Environnement (LASIRE) - UMR 8516
TGE Réseau National de RPE Interdisciplinaire [RENARD]
Laboratoire de Chimie de la Matière Condensée de Paris [LCMCP]
Binet, L [Auteur]
TGE Réseau National de RPE Interdisciplinaire [RENARD]
Laboratoire de Chimie de la Matière Condensée de Paris [LCMCP]
Gourier, D [Auteur]
TGE Réseau National de RPE Interdisciplinaire [RENARD]
Laboratoire de Chimie de la Matière Condensée de Paris [LCMCP]
Laboratoire de Chimie de la Matière Condensée de Paris (site ENSCP) [LCMCP (site ENSCP)]
Vezin, Herve [Auteur]

TGE Réseau National de RPE Interdisciplinaire [RENARD]
Laboratoire Avancé de Spectroscopie pour les Intéractions la Réactivité et l'Environnement (LASIRE) - UMR 8516
Journal title :
Journal of Physics: Condensed Matter
Abbreviated title :
J. Phys.: Condens. Matter
Volume number :
25
Pages :
316002
Publisher :
IOP Publishing
Publication date :
2013-07-09
ISSN :
1361-648X
HAL domain(s) :
Chimie/Chimie théorique et/ou physique
English abstract : [en]
The mechanism of decoherence of the electron spin of Ti3+ in β-Ga2O3 was investigated by pulsed electron paramagnetic resonance. At 4.2 K, both instantaneous and spectral diffusion contribute to the decoherence. For electron ...
Show more >The mechanism of decoherence of the electron spin of Ti3+ in β-Ga2O3 was investigated by pulsed electron paramagnetic resonance. At 4.2 K, both instantaneous and spectral diffusion contribute to the decoherence. For electron spin concentrations ≈1025 m−3 in the studied samples, calculations indicate that electron–electron couplings and electron couplings with 69Ga and 71Ga nuclei yield similar contributions to the spectral diffusion, but that electron–nuclei interactions could become the dominant cause of spectral diffusion for only slightly lower spin concentrations. Above 20 K, an additional contribution to the decoherence as well as to the spin–lattice relaxation arises from a two-optical-phonon Raman process, which becomes the leading decoherence mechanism for T > 39 K. Rabi oscillations with a damping time of about 79 ns at 4.2 K could also be observed. The damping of the Rabi oscillations, independent of the oscillation frequency, is suspected to arise from electron–nuclei interactions.Show less >
Show more >The mechanism of decoherence of the electron spin of Ti3+ in β-Ga2O3 was investigated by pulsed electron paramagnetic resonance. At 4.2 K, both instantaneous and spectral diffusion contribute to the decoherence. For electron spin concentrations ≈1025 m−3 in the studied samples, calculations indicate that electron–electron couplings and electron couplings with 69Ga and 71Ga nuclei yield similar contributions to the spectral diffusion, but that electron–nuclei interactions could become the dominant cause of spectral diffusion for only slightly lower spin concentrations. Above 20 K, an additional contribution to the decoherence as well as to the spin–lattice relaxation arises from a two-optical-phonon Raman process, which becomes the leading decoherence mechanism for T > 39 K. Rabi oscillations with a damping time of about 79 ns at 4.2 K could also be observed. The damping of the Rabi oscillations, independent of the oscillation frequency, is suspected to arise from electron–nuclei interactions.Show less >
Language :
Anglais
Peer reviewed article :
Oui
Audience :
Internationale
Popular science :
Non
Administrative institution(s) :
Université de Lille
CNRS
CNRS
Collections :
Submission date :
2021-06-17T14:54:39Z
2021-09-13T11:00:50Z
2021-09-13T11:00:50Z