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- W2897856190 abstract "Measuring degeneracy and broken-symmetry states of a system at nanoscale requires extremely high energy and spatial resolution, which has so far eluded direct observation. Here, we realize measurement of the degeneracy and subtle broken-symmetry states of graphene at nanoscale for the first time. By using edge-free graphene quantum dots, we are able to measure valley splitting and valley-contrasting spin splitting of graphene at the single-electron level. Our experiments detect large valley splitting around atomic defects of graphene due to the coexistence of sublattice symmetry breaking and time reversal symmetry breaking. Large valley-contrasting spin splitting induced by enhanced spin-orbit coupling around the defects is also observed. These results reveal unexplored exotic electronic states in graphene at nanoscale induced by the atomic defects." @default.
- W2897856190 created "2018-10-26" @default.
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- W2897856190 date "2018-06-22" @default.
- W2897856190 modified "2023-10-18" @default.
- W2897856190 title "Detecting degeneracy and subtle broken-symmetry states of graphene at nanoscale" @default.
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- W2897856190 doi "https://doi.org/10.48550/arxiv.1806.08882" @default.
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