Zusammenfassung
One of the possible mechanisms of high transition temperature (Tc)
superconductivity is Cooper pairing with the help of bosons, which
change the slope of the electronic dispersion as observed by photoemission.
Giustino et al.1 calculated that in the high temperature superconductor
La1.85Sr0.15CuO4 crystal lattice vibrations (phonons) should have
a negligible effect on photoemission spectra and concluded that phonons
do not have an important role. Here we show that the calculations
used by Giustino et al.1 do not reproduce the huge influence of electron–phonon
coupling on important phonons observed in experiments. Thus, we would
similarly expect that these calculations do not explain the role
of electron–phonon coupling for the electronic dispersion.
Nutzer