Possible instabilities in quadratic and cubic nodal-line fermion systems with correlated interactions
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DOI: 10.1103/physrevb.102.085132
Abstract: Influence of short-range four-fermion interactions on quadratic and cubic nodal-line fermion systems is studied by renormalization group theory. It is found that arbitrarily weak four-fermion interaction could drive quadratic or cubic nodal-line fermion system to… read more here.
Keywords: line fermion; quadratic cubic; nodal line; fermion ... See more keywords
Quadratic and cubic nodal lines stabilized by crystalline symmetry
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DOI: 10.1103/physrevb.99.121106
Abstract: In electronic band structures, nodal lines may arise when two (or more) bands contact and form a one-dimensional manifold of degeneracy in the Brillouin zone. Around a nodal line, the dispersion for the energy difference… read more here.
Keywords: crystalline symmetry; cubic nodal; quadratic cubic; nodal lines ... See more keywords