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We investigate Aharonov–Bohm effect in bilayer graphene. We consider a setup of n–p(n′)–n junction with Aharonov–Bohm loop connected in the transmission region. In the presence of trigonal warping we show that, due to the anisotropic dispersion of eigenspectrum, the Aharonov–Bohm interference depends on the geometry of junction: it exists for armchair interface but vanishes for zigzag interface. For...
We use superconducting rings with asymmetric link-up of current leads for experimental investigation of winding number change at magnetic field corresponding to the half of the flux quantum inside the ring. According to the conventional theory, the critical current of such rings should change by jump due to this change. Experimental data obtained at measurements of aluminum rings agree with theoretical...
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