Through a Lattice Darkly: Shedding Light on Electron-Phonon Coupling in the High Tc Cuprates

Figure 1

(a–c) ARPES data taken at 25 K on optimally doped Bi2212 superconductor ( = 92 K), for a cut along the Y direction through the nodal point in momentum space (indicated in panel (a) inset). (d–f) The same sample and orientation, but taken nearer the Brillouin zone (BZ) edge (or antinodal point) in momentum space (indicated in panel (d) inset). (a) and (d) Raw ARPES data taken with a color scale where intensity increases from pale yellow to green to blue to white to red. Here, blue (white) corresponds to () of the maximum intensity. (b) and (e) Same data but as an “MDC map”, where each MDC has been normalized so that its maximum and minimum intensities are 1 and 0, respectively. (c) and (f) Same data but now each EDC has been appropriately normalized to create an “EDC map”. Thick black arrows indicate the energy of the bosonic mode while the is the superconducting gap. Energy resolution used here is 15 meV.

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