Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Topological surface states on Bi(111) based on empirical tight-binding
  calculations   The topological order of single-crystal Bi and its surface states on the
(111) surface are studied in detail based on empirical tight-binding (TB)
calculations. New TB parameters are presented that are used to calculate the
surface states of semi-infinite single-crystal Bi(111), which agree with the
experimental angle-resolved photoelectron spectroscopy results. The influence
of the crystal lattice distortion is surveyed and a topological phase
transition is found that is driven by in-plane expansion. In contrast with the
semi-infinite system, the surface-state dispersions on finite-thickness slabs
are non-trivial irrespective of the bulk topological order. The role of the
interaction between the top and bottom surfaces in the slab is systematically
studied, and it is revealed that a very thick slab is required to properly
obtain the bulk topological order of Bi from the (111) surface state: above 150
biatomic layers in this case.

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The categories of this paper are: q-alg
23
The categories of this paper are: solv-int
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The categories of this paper are: eess
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The categories of this paper are: comp-gas
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The categories of this paper are: adap-org
8
The categories of this paper are: hep-ex
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The categories of this paper are: econ
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The categories of this paper are: chao-dyn
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The categories of this paper are: q-fin
3
The categories of this paper are: physics
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The categories of this paper are: atom-ph
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The categories of this paper are: mtrl-th
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The categories of this paper are: math-ph
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The categories of this paper are: ao-sci
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The categories of this paper are: acc-phys
9
The categories of this paper are: nlin