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Article Dans Une Revue Communications Physics Année : 2023

Hydrogenic spin-valley states of the bromine donor in 2H-MoTe2

Vasily Stolyarov
Vyacheslav Marchenkov
Sergey Naumov
  • Fonction : Auteur
Alexandra Perevalova
  • Fonction : Auteur
Mahdi Ghorbani-Asl
Hervé Aubin

Résumé

In semiconductors, the identification of doping atomic elements allowing to encode a qubit within spin states is of intense interest for quantum technologies. In transition metal dichalcogenides semiconductors, the strong spin-orbit coupling produces locked spin-valley states with expected long coherence time. Here we study the substitutional Bromine Br Te dopant in 2H-MoTe 2 . Electron spin resonance measurements show that this dopant carries a spin with long-lived nanoseconds coherence time. Using scanning tunneling spectroscopy, we find that the hydrogenic wavefunctions associated with the dopant levels have characteristics spatial modulations that result from their hybridization to the Q -valleys of the conduction band. From a Fourier analysis of the conductance maps, we find that the amplitude and phase of the Fourier components change with energy according to the different irreducible representations of the impurity-site point-group symmetry. These results demonstrate that a dopant can inherit the locked spin-valley properties of the semiconductor and so exhibit long spin-coherence time.
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Dates et versions

hal-04236984 , version 1 (11-10-2023)

Identifiants

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Valeria Sheina, Guillaume Lang, Vasily Stolyarov, Vyacheslav Marchenkov, Sergey Naumov, et al.. Hydrogenic spin-valley states of the bromine donor in 2H-MoTe2. Communications Physics, 2023, 6 (1), pp.135. ⟨10.1038/s42005-023-01244-7⟩. ⟨hal-04236984⟩
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