Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Bandgap tunability in graphene via bag boundary conditions on Dirac
  quasispinors   Using field-theoretic descriptions of low-energy excitations in graphene via
massless Dirac quasispinors, we show that a generalized form of bag boundary
conditions on quasispinor currents can be used to predict continuous bandgap
tunability in narrow areas (nanolanes) of graphene. The model nanolanes are
envisaged as quasi-one-dimensional areas between any pair of straight parallel
lines drawn across the honeycomb lattice, with the quasispinor currents allowed
to partially permeate through the boundary lines. We show that such a
construction predicts metalizable armchair and zigzag nanolanes, whose bandgaps
can be decreased down to zero by decreasing the mismatch between the boundary
permeabilities, as well as insulating nanolanes, whose bandgaps can be made
significantly larger than those of graphene nanoribbons. The cases of graphene
nanoribbons follow from our model in the limit of impermeable (no-flux)
boundaries. Unlike previous implementations of no-flux bag boundaries, our
formulation accurately reproduces the tight-binding results for the nanoribbon
bandgap down to nanoribbon widths of only a couple of lattice spacing, even as
the nanolane description does not include the edge-states of zigzag
nanoribbons.

31
The categories of this paper are: ao-sci
20
The categories of this paper are: acc-phys
18
The categories of this paper are: econ
28
The categories of this paper are: alg-geom
26
The categories of this paper are: bayes-an
24
The categories of this paper are: dg-ga
30
The categories of this paper are: q-alg
19
The categories of this paper are: eess
33
The categories of this paper are: plasm-ph
9
The categories of this paper are: nlin
12
The categories of this paper are: nucl-th
29
The categories of this paper are: funct-an
0
The categories of this paper are: hep-ph
37
The categories of this paper are: supr-con
21
The categories of this paper are: adap-org
8
The categories of this paper are: hep-ex