Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Direct Role of Structural Dynamics in Electron-Lattice Coupling of
  Superconducting Cuprates   The mechanism of electron pairing in high-temperature superconductors is
still the subject of intense debate. Here, we provide direct evidence of the
role of structural dynamics, with selective atomic motions (buckling of
copper-oxygen planes), in the anisotropic electronlattice coupling. The
transient structures were determined using time-resolved electron diffraction,
following carrier excitation with polarized femtosecond heating pulses, and
examined for different dopings and temperatures. The deformation amplitude
reaches 0.5 % of the c-axis value of 30 A when the light polarization is in the
direction of the copper-oxygen bond, but its decay slows down at 45 degrees.
These findings suggest a selective dynamical lattice involvement with the
anisotropic electron-phonon coupling being on a time scale (1 to 3.5 ps
depending on direction) of the same order of magnitude as that of the spin
exchange of electron pairing in the high-temperature superconducting phase.

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The categories of this paper are: atom-ph
14
The categories of this paper are: math-ph
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The categories of this paper are: mtrl-th
16
The categories of this paper are: stat
19
The categories of this paper are: eess
15
The categories of this paper are: nucl-ex
20
The categories of this paper are: acc-phys
5
The categories of this paper are: gr-qc
9
The categories of this paper are: nlin
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The categories of this paper are: plasm-ph
24
The categories of this paper are: dg-ga
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The categories of this paper are: cmp-lg
25
The categories of this paper are: patt-sol
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The categories of this paper are: comp-gas
22
The categories of this paper are: chao-dyn
7
The categories of this paper are: hep-th