Fermions with cubic and quartic spectrum

Details Fermions with cubic and quartic spectrum Fermions with cubic and quartic spectrum

2010-10-03

arxiv.org/abs/1010.0393v3

Pisma Zh.Eksp.Teor.Fiz.91:669-675,2010; JETP Lett.92:681-686,2010

Physics

Condensed Matter

Strongly Correlated Electrons

6 pages, 6 figures, JETP Letters style, version submitted to JETP Letters, references added

Scientific paper

10.1134/S0021364010220091

We study exotic fermions with spectrum E^2 ~ p^{2N}. Such spectrum emerges in
the vicinity of the Fermi point with multiple topological charge N, if special
symmetry is obeyed. When this symmetry is violated, the multiple Fermi point
typically splits into N elementary Fermi points -- Dirac points with N=1 and
spectrum E^2 ~ p^2 .

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