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Persistent currents in Dirac fermion rings

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Academic year: 2021

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FIG. 2. Left: Creutz model in zero flux on a linear infinite lattice. The horizontal ladders represent symbolically the two spin projections: the upper (lower) ladder with filled (empty) circles denotes σ 3 spin-up (spin-down) states
FIG. 4. (Color online) Energy-flux characteristic E ± n = ± ¯ hω (n + / 0 ). Fermi energy E F is fixed at zero, and the flux / 0
FIG. 5. (Color online) The regularized ground-state energy of the ring as a function of the magnetic flux, / 0 , from Eq
FIG. 8. (Color online) Energy-flux dependence in the Creutz model (4) with a single scalar potential U 0s
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