Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Anomalous doping evolution of nodal dispersion revealed by in-situ ARPES
  on continuously doped cuprates   We study the systematic doping evolution of nodal dispersions by in-situ
angle-resolved photoemission spectroscopy on the continuously doped surface of
a high-temperature superconductor Bi$_2$Sr$_2$CaCu$_2$O$_{8+x}$. We reveal that
the nodal dispersion has three segments separated by two kinks, located at ~10
meV and roughly 70 meV, respectively. The three segments have different band
velocities and different doping dependence. In particular, the velocity of the
high-energy segment increases monotonically as the doping level decreases and
can even surpass the bare band velocity. We propose that electron
fractionalization is a possible cause for this anomalous nodal dispersion and
may even play a key role in the understanding of exotic properties of cuprates.

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The categories of this paper are: dg-ga
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The categories of this paper are: q-bio
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The categories of this paper are: comp-gas
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The categories of this paper are: patt-sol
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The categories of this paper are: gr-qc
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The categories of this paper are: atom-ph
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The categories of this paper are: supr-con
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The categories of this paper are: nucl-th
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The categories of this paper are: funct-an
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The categories of this paper are: mtrl-th
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The categories of this paper are: chem-ph
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The categories of this paper are: cmp-lg
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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: hep-ex
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The categories of this paper are: hep-ph