17 citations · 26 across the 4 of their papers we have counts for
4 papers
Coulomb screening in graphene with topological defects
Baishali Chakraborty, Kumar S. Gupta, Siddhartha Sen
We analyze the screening of an external Coulomb charge in gapless graphene cone, which is taken as a prototype of a topological defect. In the subcritical regime, the induced charg…
Friedel sum rule in the presence of topological defects for graphene
Baishali Chakraborty, Kumar S. Gupta, Siddhartha Sen
The Friedel sum rule is extended to deal with topological defects for the case of a graphene cone in the presence of an external Coulomb charge. The dependence in the way the numbe…
Effect of topological defects and Coulomb charge on the low energy quantum dynamics of gapped graphene
Baishali Chakraborty, Kumar S. Gupta, Siddhartha Sen
We study the combined effect of a conical topological defect and a Coulomb charge impurity on the dynamics of Dirac fermions in gapped graphene. Beyond a certain strength of the Co…
Effect of topology on the critical charge in graphene
Baishali Chakraborty, Kumar S. Gupta, Siddhartha Sen
We show that the critical charge for the Dirac excitations in gapless graphene depends on the spatial topology of the sample. In particular, for graphene cones, the effective value…