Unconventional properties of superconducting cuprates

Physics – Condensed Matter – Superconductivity

Scientific paper

Rate now

  [ 0.00 ] – not rated yet Voters 0   Comments 0

Details

4 pages, RevTeX, 4 eps figures embedded in the text

Scientific paper

10.1016/S0921-4526(98)00882-5

We present an explanation of the unusual peak/dip/hump features observed in photoemission experiments on Bi2212 at $T \ll T_c$. We argue that these features arise from the interaction of the fermionic quasi-particles with overdamped spin fluctuations. We show that the strong spin-fermion interaction combined with the feedback effect on the spin damping due to superconductivity yields a Fermi-liquid form of the fermionic spectral function for $\omega < 2 \Delta$ where $\Delta$ is the maximum value of the superconducting gap, and a non-Fermi-liquid form for $\omega > 2 {\Delta}$. In the Fermi-liquid regime, the spectral function $A({\bf k}_F,\omega)$ displays a quasiparticle peak at $\omega = {\Delta}$; in the non-Fermi-liquid regime it possesses a broad maximum (hump) at $\omega \gg {\Delta}$. In between the two regimes, the spectral function has a dip at $\omega \sim 2 {\Delta}$. We argue that our theory also explains the tunneling data for the superconducting density of states.

No associations

LandOfFree

Say what you really think

Search LandOfFree.com for scientists and scientific papers. Rate them and share your experience with other people.

Rating

Unconventional properties of superconducting cuprates 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 Unconventional properties of superconducting cuprates, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Unconventional properties of superconducting cuprates will most certainly appreciate the feedback.

Rate now

     

Profile ID: LFWR-SCP-O-438115

  Search
All data on this website is collected from public sources. Our data reflects the most accurate information available at the time of publication.