4 papers
On the topological character of three-dimensional Nexus triple point degeneracies
Ankur Das, Sumiran Pujari
Recently a generic class of three-dimensional band structures was identified that host two-fold line degeneracies meeting at three-fold or triple point degeneracies, which resist t…
Stability of zero energy Dirac touchings in the honeycomb Hofstadter problem
Ankur Das, Ribhu K. Kaul, Ganpathy Murthy
We study the band structure of electrons hopping on a honeycomb lattice with 1/q (q integer) flux quanta through each elementary hexagon. In the nearest neighbor hopping model the…
SU(3) fermions in a three-band Graphene-like model
Ankur Das, Sumiran Pujari
Two-dimensional Graphene is fascinating because of its unique electronic properties. From a fundamental perspective, one among them is the geometric phase structure near the Dirac…
Phase Transition In Gauge Theory With Many Fundamental Bosons
Ankur Das
Here we study the Renormalization group flow of gauge theory with -fundamental bosons in dimension by calculating the beta functions. We found a new sta…