Fermion zero modes on vortices in chiral superconductors
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The energy levels of fermions bound to the vortex core are considered for the general case of chiral superconductors. There are two classes of chiral superconductivity: in the class I superconducting state the axisymmetric singly quantized vortex has the same energy spectrum of bound states as in an s-wave superconductor: E=(n+1/2)ω0, with integral n. In class II the corresponding spectrum is E=nω0 and thus contains a state with exactly zero energy. The effect of a single impurity on the spectrum of bound states is also considered. For class I the spectrum acquires the doubled period ΔE=2ω0 and consists of two equidistant sets of levels, in accordance with A. I. Larkin and Yu. N. Ovchinnikov, Phys. Rev. B 57, 5457 (1998). For the class II states the spectrum is not influenced by a single impurity if the same approximation is applied.
PACS numbers74.20.Mn 74.60.Ge
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- 8.A. A. Koulakov and A. I. Larkin, Phys. Rev. B 59, 12021 (1999).Google Scholar
- 9.M. Stone, Phys. Rev. B 54, 13222 (1996).Google Scholar
- 14.J. Goryo, http://xxx.lanl.gov/abs/cond-mat/9908113; G. E.Volovik, AIP Conference Proceedings, Vol. 194, edited by G. G. Ihas and Y. Takano, Gainesville, Fla. (1989), pp. 136–146.