a-b plane optical conductivity in YBa_2Cu_3O_{7-delta} above and below T*

Details a-b plane optical conductivity in YBa_2Cu_3O_{7-delta} above and below T* a-b plane optical conductivity in YBa_2Cu_3O_{7-delta} above and below T*

1998-01-06

arxiv.org/abs/cond-mat/9801032v1

Physics

Condensed Matter

Superconductivity

6 pages, 4 figures

Scientific paper

10.1103/PhysRevB.57.6116

Analysis of the a-b plane optical conductivity $\sigma_{ab}$ for both twinned and untwinned YBa$_{2}$Cu$_{3}$O$_{7-\delta}$ as a function of temperature and doping shows that below a well defined temperature T*, a dip in the spectrum systematically appears separating the infrared charge excitation spectrum into two components with distinct energy scales. The change from monotonic behaviour in $\sigma_{ab}$ is found to be concurrent with the onset of phonon anomalies in Raman and infrared spectra below T*. The optical data are suggested to be evidence for the appearance of an inhomogeneous distribution of carriers rather than the opening of a simple gap for charge excitations below T*, an interpretation wich is consistent with recent angle-resoved photoemission and electronic Raman spectra. We find that the behaviour below T* and the absence of any anomalies at Tc can be interpreted assuming a Bose-Einstein condensation of preformed pairs.

Affiliated with

Also associated with

No associations

Rating

a-b plane optical conductivity in YBa_2Cu_3O_{7-delta} above and below T* 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 a-b plane optical conductivity in YBa_2Cu_3O_{7-delta} above and below T*, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and a-b plane optical conductivity in YBa_2Cu_3O_{7-delta} above and below T* will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFWR-SCP-O-613659