Find in Library
Search millions of books, articles, and more
Indexed Open Access Databases
Hydrogenic spin-valley states of the bromine donor in 2H-MoTe2
oleh: Valeria Sheina, Guillaume Lang, Vasily Stolyarov, Vyacheslav Marchenkov, Sergey Naumov, Alexandra Perevalova, Jean-Christophe Girard, Guillemin Rodary, Christophe David, Leonnel Romuald Sop, Debora Pierucci, Abdelkarim Ouerghi, Jean-Louis Cantin, Brigitte Leridon, Mahdi Ghorbani-Asl, Arkady V. Krasheninnikov, Hervé Aubin
Format: | Article |
---|---|
Diterbitkan: | Nature Portfolio 2023-06-01 |
Deskripsi
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 BrTe 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.