One-dimensional fermi liquid and symmetry breaking in the vortex core

Details One-dimensional fermi liquid and symmetry breaking in the vortex core One-dimensional fermi liquid and symmetry breaking in the vortex core

1995-10-13

arxiv.org/abs/cond-mat/9510075v1

Pisma Zh.Eksp.Teor.Fiz. 62 (1995) 719-725; JETP Lett. 62 (1995) 737-744

Physics

Condensed Matter

10 pages, LaTeX file, 3 figures are available at http://boojum.hut.fi/abstracts/lowtemp/LTL-95007.html

Scientific paper

Fermions localized within vortex cores can form one-dimensional Fermi liquids. The nonzero density of states in these Fermi-liquids can lead to instability of the symmetric structure of the vortex core. We consider a symmetry breaking which is obtained due to spontaneous admixture of the spin-triplet p-wave component of the order parameter in conventional s-wave vortex in the presence of magnetic field. This occurs at low enough temperature and leads to an asymmetric shape of the vortex core. Similar phenomenon of the symmetry breaking induced by the core fermions occurs in electroweak $Z$-strings (S.G. Naculich, Phys. Rev. Lett., 75 (1995), 998).

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