Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Insensitivity of the striped charge-orders in IrTe$_2$ to alkali surface
  doping implies their structural origin   We present a combined angle-resolved photoemission spectroscopy and
low-energy electron diffraction (LEED) study of the prominent transition metal
dichalcogenide IrTe$_2$ upon potassium (K) deposition on its surface. Pristine
IrTe$_2$ undergoes a series of charge-ordered phase transitions below room
temperature that are characterized by the formation of stripes of Ir dimers of
different periodicities. Supported by density functional theory calculations,
we first show that the K atoms dope the topmost IrTe$_2$ layer with electrons,
therefore strongly decreasing the work function and shifting only the
electronic surface states towards higher binding energy. We then follow the
evolution of its electronic structure as a function of temperature across the
charge-ordered phase transitions and observe that their critical temperatures
are unchanged for K coverages of $0.13$ and $0.21$~monolayer (ML). Using LEED,
we also confirm that the periodicity of the related stripe phases is unaffected
by the K doping. We surmise that the charge-ordered phase transitions of
IrTe$_2$ are robust against electron surface doping, because of its metallic
nature at all temperatures, and due to the importance of structural effects in
stabilizing charge order in IrTe$_2$.

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The categories of this paper are: adap-org
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The categories of this paper are: q-alg
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The categories of this paper are: atom-ph
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The categories of this paper are: math
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The categories of this paper are: nlin
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The categories of this paper are: supr-con
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The categories of this paper are: chao-dyn
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The categories of this paper are: math-ph
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The categories of this paper are: funct-an
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The categories of this paper are: q-bio
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The categories of this paper are: physics
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The categories of this paper are: nucl-ex
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The categories of this paper are: chem-ph
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The categories of this paper are: acc-phys
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The categories of this paper are: nucl-th
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The categories of this paper are: ao-sci