1307.7254 (A. E. Myasnikova et al.)

Manifestation of spontaneously broken translational symmetry in ARPES
spectra of essentially doped cuprates    [PDF]

A. E. Myasnikova, E. N. Myasnikov, D. V. Moseykin, I. S. Zuev

Broad bands in optical conductivity and photoemission spectra of doped cuprates are ordinarily explained as manifestation of strong electron-phonon interaction (EPI). These broad bands result from radiation of different number of phonons in different acts of the self-trapped carrier photodissociation. It is possible only at decay of phonon condensate, or of phonon vacuum deformation, formed due to spontaneous breaking of the translational symmetry (SBTS) of interacting electron and phonon fields. Thus, the broad bands indicate the SBTS in doped cuprates. Here we show that account of SBTS allows to explain from the unified point of view a number of other effects observed in dopes cuprates such as the so called "vertical dispersion" in ARPES spectra and opposition of the antiferromagnetism and superconductivity. To do this we develop and apply the distribution function for fermions in a system with SBTS where the fermion momentum can have essential uncertainty.

View original: http://arxiv.org/abs/1307.7254