Title :

Giant titanium electron wave function in gallium oxide: A potential electron-nuclear spin system for quantum information processing

Author(s) :

Mentink-Vigier, Frédéric [Auteur]
Laboratoire de Chimie de la Matière Condensée de Paris (site ENSCP) [LCMCP (site ENSCP)]
Binet, Laurent [Auteur]
Laboratoire de Chimie de la Matière Condensée de Paris (site ENSCP) [LCMCP (site ENSCP)]
Vignoles, Gerard [Auteur]
Laboratoire de Chimie de la Matière Condensée de Paris (site ENSCP) [LCMCP (site ENSCP)]
Gourier, Didier [Auteur]
Laboratoire de Chimie de la Matière Condensée de Paris (site ENSCP) [LCMCP (site ENSCP)]
Vezin, Herve [Auteur]
Laboratoire Avancé de Spectroscopie pour les Intéractions la Réactivité et l'Environnement - UMR 8516 [LASIRE]
Laboratoire de Chimie Organique et Macromoleculaire [UMR CNRS 8009]

Journal title :

Physical Review B: Condensed Matter and Materials Physics (1998-2015)

Abbreviated title :

Phys. Rev. B

Volume number :

82

Publisher :

American Physical Society (APS)

Publication date :

2010-11-11

ISSN :

1550-235X

HAL domain(s) :

Chimie/Chimie théorique et/ou physique

English abstract : [en]

The hyperfine interactions of the unpaired electron with eight surrounding 69Ga and 71Ga nuclei in Ti-doped β-Ga2O3 were analyzed by electron paramagnetic resonance (EPR) and electron-nuclear double resonance (ENDOR) ...
Show more >The hyperfine interactions of the unpaired electron with eight surrounding 69Ga and 71Ga nuclei in Ti-doped β-Ga2O3 were analyzed by electron paramagnetic resonance (EPR) and electron-nuclear double resonance (ENDOR) spectroscopies. They are dominated by strong isotropic hyperfine couplings due to a direct Fermi contact interaction with Ga nuclei in octahedral sites of rutile-type chains oriented along b axis, revealing a large anisotropic spatial extension of the electron wave function. Titanium in β-Ga2O3 is thus best described as a diffuse (Ti4+−e−) pair rather than as a localized Ti3+. Both electron and 69Ga nuclear spin Rabi oscillations could be observed by pulsed EPR and pulsed ENDOR, respectively. The electron spin decoherence time is about 1 μs (at 4 K) and an upper bound of 520 μs (at 8 K) is estimated for the nuclear decoherence time. Thus, β-Ga2O3:Ti appears to be a potential spin-bus system for quantum information processing with a large nuclear spin quantum register.Show less >

Language :

Anglais

Audience :

Internationale

Popular science :

Non

Administrative institution(s) :

Université de Lille
CNRS

Collections :

• Laboratoire Avancé de Spectroscopie pour les Intéractions la Réactivité et l'Environnement (LASIRE) - UMR 8516

Submission date :

2021-06-18T08:34:46Z
2021-10-08T11:30:45Z