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Article
Observation of Van Hove singularities in twisted graphene layers
When a Van Hove singularity exists near the Fermi energy of a solid’s density of states, it can cause a variety of exotic phenomena to emerge. Scanning tunnelling microscope measurements indicate that when gra...
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Article
Evidence for a glassy phase in the vortex state of 2H−NbSe2
We have measured the DC response and RF surface impedance of 2H−NbSe 2 single crystals in fields up to 2 Tesla. The results suggest that there are two distinct states of the vortex lattice; one is...