Fermions with cubic and quartic spectrum
Abstract
We study exotic fermions with spectrum E2 ∝ p2N. 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, i.e., Dirac points with N = 1 and spectrum E2 ∝ p2.
- Publication:
-
Soviet Journal of Experimental and Theoretical Physics Letters
- Pub Date:
- November 2010
- DOI:
- 10.1134/S0021364010220091
- arXiv:
- arXiv:1010.0393
- Bibcode:
- 2010JETPL..92..681H
- Keywords:
-
- JETP Letter;
- Topological Charge;
- Dirac Point;
- Lorentz Symmetry;
- Fermi Point;
- Condensed Matter - Strongly Correlated Electrons;
- High Energy Physics - Phenomenology
- E-Print:
- 6 pages, 6 figures, JETP Letters style, version submitted to JETP Letters, references added