Hydrogenic Spin-Valley States of the Bromine Donor in 2H-MoTe2
Hydrogenic Spin-Valley States of the Bromine Donor in 2H-MoTe2
Sheina, V.; Lang, G.; Stolyarov, V.; Marchenkov, V.; Naumov, S.; Perevalova, A.; Girard, J.-C.; Rodary, G.; David, C.; Romuald Sop, L.; Pierucci, D.; Ouerghi, A.; Cantin, J.-L.; Leridon, B.; Ghorbani Asl, M.; Krasheninnikov, A.; Aubin, H.
Abstract
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-MoTe2. 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.
Keywords: quantum technologies; spin-valley state; doping; MoTe2; scanning tunneling spectroscopy; DFT
Beteiligte Forschungsanlagen
- Ionenstrahlzentrum DOI: 10.17815/jlsrf-3-159
Verknüpfte Publikationen
- DOI: 10.17815/jlsrf-3-159 is cited by this (Id 37017) publication
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Communications Physics 6(2023), 135
DOI: 10.1038/s42005-023-01244-7
Cited 1 times in Scopus
Permalink: https://www.hzdr.de/publications/Publ-37017