Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Role of a higher dimensional interaction in stabilizing charge density
  waves in quasi-1D NbSe$_3$ revealed by angle-resolved photoemission
  spectroscopy   We revisit charge density wave (CDW) behavior in the archetypal
quasi-one-dimensional (quasi-1D) material NbSe$_3$ by high-resolution
angle-resolved photoemission spectroscopy measurements utilizing a microfocused
laser with a photon energy of 6.3 eV. We present a detailed view of the
electronic structure of this complex multiband system and unambiguously resolve
CDW gaps at the Fermi level ($E_F$). By employing a tight-binding model, we
argue that these gaps are the result of interband coupling between electronic
states that reside predominantly on distinct 1D chains within the material. Two
such localized states are found to couple to an electronic state that extends
across multiple 1D chains, highlighting the importance of a higher-dimensional
interaction in stabilizing the CDW ordering in this material. In addition, the
temperature evolution of intrachain gaps caused by the CDW periodicities far
below $E_F$ deviate from the behavior expected for a Peierls-type mechanism
driven by nesting; the upper and lower bands of the renormalized CDW
dispersions maintain a fixed peak-to-peak distance while the gaps are gradually
removed at higher temperatures. This points toward a gradual loss of long-range
phase coherence as the dominant effect in reducing the CDW order parameter,
which may correspond to the loss of coherence between the coupled chains.
Furthermore, one of the gaps is observed above the bulk and surface CDW
transition temperatures, implying the persistence of short-range incoherent CDW
order. The influence of such higher-dimensional interactions likely plays an
important role in a range of low-dimensional systems.

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The categories of this paper are: nlin
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The categories of this paper are: stat
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The categories of this paper are: acc-phys
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The categories of this paper are: plasm-ph
29
The categories of this paper are: funct-an
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The categories of this paper are: math-ph
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The categories of this paper are: q-bio
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The categories of this paper are: adap-org
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The categories of this paper are: astro-ph
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The categories of this paper are: nucl-ex
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The categories of this paper are: solv-int
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The categories of this paper are: math
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The categories of this paper are: physics
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The categories of this paper are: patt-sol
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The categories of this paper are: quant-ph
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The categories of this paper are: alg-geom