Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Antinodal quasiparticles below and above T_Curie in the CMR oxide
  La_(2-2x)Sr_(1+2x)Mn_(2)O_(7) with x=0.36   In light of recent conflicting angle resolved photoemission studies on the
bilayered colossal magnetoresistant (CMR) manganite
La_{2-2x}Sr_{1+2x}Mn_{2}O_{7} (0.36< x< 0.40), new ARPES data are presented for
x=0.36 and 0.40, showing only for the former clear quasiparticle-like features
at and around the (pi, 0)-point in k-space. The electronic states are clearly
renormalised, both as regards their dispersion relation and lifetime due to
coupling to bosonic degrees of freedom. Importantly, both the existence of
quasiparticles and their renormalisation survive well into the paramagnetic
state, up to 50 K above T_Curie. This argues against strong coupling to spin
modes and raises questions regarding the nature of the paramagnetic insulating
phase.

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The categories of this paper are: acc-phys
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The categories of this paper are: chem-ph
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The categories of this paper are: funct-an
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The categories of this paper are: econ
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The categories of this paper are: nucl-th
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The categories of this paper are: q-bio
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The categories of this paper are: nucl-ex
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The categories of this paper are: math-ph
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The categories of this paper are: cmp-lg
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The categories of this paper are: stat
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The categories of this paper are: adap-org
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The categories of this paper are: hep-ph
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The categories of this paper are: bayes-an
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The categories of this paper are: patt-sol
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The categories of this paper are: physics
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The categories of this paper are: quant-ph