Displacive Excitation of Coherent Phonons in YBa_2Cu_3 O_7: An Optical Evidence for the Van-Hove Singularity

Details Displacive Excitation of Coherent Phonons in YBa_2Cu_3 O_7: An Optical Evidence for the Van-Hove Singularity Displacive Excitation of Coherent Phonons in YBa_2Cu_3 O_7: An Optical Evidence for the Van-Hove Singularity

1996-01-12

arxiv.org/abs/cond-mat/9601042v2

Physics

Condensed Matter

4 pages, 5 figures

Scientific paper

The amplitude of displacive excitation of coherent phonons ({\it DECP}) in $YBa_2Cu_3O_7$ observed in time-resolved spectroscopy increases by a very large factor of 15 between 20 K (below $T_c$) and 100 K (above $T_c$). Microscopic modelling of phonon excitation reveals that these amplitude changes of the {\it $A_{1g}$} mode phonons are related to the existence of the {\it Van-Hove} singularity (VHS) below but very close to Fermi energy. PACS numbers: 78.47.+p, 74.25.Gz, 74.25.Jb, 71.15.Fv

Affiliated with

Also associated with

No associations

Rating

Displacive Excitation of Coherent Phonons in YBa_2Cu_3 O_7: An Optical Evidence for the Van-Hove Singularity 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 Displacive Excitation of Coherent Phonons in YBa_2Cu_3 O_7: An Optical Evidence for the Van-Hove Singularity, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Displacive Excitation of Coherent Phonons in YBa_2Cu_3 O_7: An Optical Evidence for the Van-Hove Singularity will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFWR-SCP-O-269632