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- Warm-up spectroscopy of quadrupole-split nuclear spins in n-GaAs epitaxial layers doi link

Auteur(s): Litvyak V. m., Cherbunin R., Kalevich V. k., Lihachev A., Nashchekin A., Vladimirova M.(Corresp.), Kavokin K.

(Article) Publié: Physical Review B, vol. 104 p.235201 (2021)
Texte intégral en Openaccess : fichier pdf


DOI: 10.1103/PhysRevB.104.235201
WoS: WOS:000733570400001
Résumé:

The efficiency of the adiabatic demagnetization of the nuclear spin system (NSS) of a solid is limited, if quadrupole effects are present. Nevertheless, despite a considerable quadrupole interaction, recent experiments validated the thermodynamic description of the NSS in GaAs. This suggests that nuclear spin temperature can be used as a probe of nuclear magnetic resonances. We implement this idea by analyzing the modification of the NSS temperature in response to an oscillating magnetic field at various frequencies, an approach termed as the warm-up spectroscopy. It is tested in a n-GaAs sample where both mechanical strain and built-in electric field may contribute to the quadrupole splitting, yielding the parameters of electric field gradient tensors for 75As and both Ga isotopes, 69Ga and 71Ga.