Evidence for very strong electron-phonon coupling in YBa_{2}Cu_{3}O_{6}

Details Evidence for very strong electron-phonon coupling in YBa_{2}Cu_{3}O_{6} Evidence for very strong electron-phonon coupling in YBa_{2}Cu_{3}O_{6}

2004-12-10

arxiv.org/abs/cond-mat/0412262v3

PRB 75, 104511 (2007)

Physics

Condensed Matter

Superconductivity

4 pages, 1 figure

Scientific paper

From the observed oxygen-isotope shift of the mid-infrared two-magnon absorption peak of YBa$_{2}$Cu$_{3}$O$_{6}$, we evaluate the oxygen-isotope effect on the in-plane antiferromagnetic exchange energy $J$. The exchange energy $J$ in YBa$_{2}$Cu$_{3}$O$_{6}$ is found to decrease by about 0.9% upon replacing $^{16}$O by $^{18}$O, which is slightly larger than that (0.6%) in La$_{2}$CuO$_{4}$. From the oxygen-isotope effects, we determine the lower limit of the polaron binding energy, which is about 1.7 eV for YBa$_{2}$Cu$_{3}$O$_{6}$ and 1.5 eV for La$_{2}$CuO$_{4}$, in quantitative agreement with angle-resolved photoemission data, optical conductivity data, and the parameter-free theoretical estimate. The large polaron binding energies in the insulating parent compounds suggest that electron-phonon coupling should also be strong in doped superconducting cuprates and may play an essential role in high-temperature superconductivity.

Affiliated with

Also associated with

No associations

Rating

Evidence for very strong electron-phonon coupling in YBa_{2}Cu_{3}O_{6} does not yet have a rating. At this time, there are no reviews or comments for this scientific paper.

If you have personal experience with Evidence for very strong electron-phonon coupling in YBa_{2}Cu_{3}O_{6}, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Evidence for very strong electron-phonon coupling in YBa_{2}Cu_{3}O_{6} will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFWR-SCP-O-451766