Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Switching of band inversion and topological surface states by charge
  density wave   Topologically nontrivial materials host protected edge states associated with
the bulk band inversion through the bulk-edge correspondence. Manipulating such
edge states is highly desired for developing new functions and devices
practically using their dissipation-less nature and spin-momentum locking. Here
we introduce a transition-metal dichalcogenide VTe$_2$, that hosts a charge
density wave (CDW) coupled with the band inversion involving V3$d$ and Te5$p$
orbitals. Spin- and angle-resolved photoemission spectroscopy with
first-principles calculations reveal the huge anisotropic modification of the
bulk electronic structure by the CDW formation, accompanying the selective
disappearance of Dirac-type spin-polarized topological surface states that
exist in the normal state. Thorough three dimensional investigation of bulk
states indicates that the corresponding band inversion at the Brillouin zone
boundary dissolves upon CDW formation, by transforming into anomalous flat
bands. Our finding provides a new insight to the topological manipulation of
matters by utilizing CDWs' flexible characters to external stimuli.

11
The categories of this paper are: hep-lat
17
The categories of this paper are: q-fin
27
The categories of this paper are: comp-gas
20
The categories of this paper are: acc-phys
33
The categories of this paper are: plasm-ph
9
The categories of this paper are: nlin
2
The categories of this paper are: math
23
The categories of this paper are: solv-int
5
The categories of this paper are: gr-qc
13
The categories of this paper are: quant-ph
16
The categories of this paper are: stat
15
The categories of this paper are: nucl-ex
22
The categories of this paper are: chao-dyn
14
The categories of this paper are: math-ph
6
The categories of this paper are: astro-ph
12
The categories of this paper are: nucl-th