Instability and topological robustness of Weyl semimetals against Coulomb interaction

There is a close connection between various new phenomena in Weyl semimetals and the existence of linear band crossings in the single particle description. We show, by a full self-consistent mean-field calculation, how this picture is modified in the presence of long-range Coulomb interactions. The chiral symmetry breaking occurs at strong enough interactions and the internode interband excitonic pairing channel is found to be significant, which determines the gap-opened band profile varying with interaction strength. Remarkably, in the resultant interacting phase, finite band Chern number jumps in the three-dimensional momentum space are retained, indicating the robustness of the topologically nontrivial features.Comment: 8 pages, 4 figures, accepted by Phys. Rev.

Known tetranucleotide target sequences for <i>IS5</i> (from ISfinder).

<p>Known tetranucleotide target sequences for <i>IS5</i> (from ISfinder).</p

Bacterial experimental systems in which environmental conditions are known (or proposed) to influence the frequencies of IS insertions that activate or inactivate genes.

<p>Bacterial experimental systems in which environmental conditions are known (or proposed) to influence the frequencies of IS insertions that activate or inactivate genes.</p

Sequence co-ordinates of DNA sequences used for SIDD mapping.

<p>Sequence co-ordinates of DNA sequences used for SIDD mapping.</p

Frequencies of total FZD^r (<i>nfsB</i>) mutants, total IS insertional mutants and IS5 insertional mutants.

<p>Frequencies of total FZD^r (<i>nfsB</i>) mutants, total IS insertional mutants and IS5 insertional mutants.</p