Critical temperature and giant isotope effect in presence of paramagnons

Physics – Condensed Matter – Superconductivity

Scientific paper

Rate now

  [ 0.00 ] – not rated yet Voters 0   Comments 0

Details

5 pages, 2 figures

Scientific paper

We reconsider the long-standing problem of the effect of spin fluctuations on the critical temperature and isotope effect in a phonon-mediated superconductor. Although the general physics of the interplay between phonons and paramagnons had been rather well understood, the existing approximate formulas fail to describe the correct behavior of $% T_{c}$ for general phonon and paramagnon spectra. Using a controllable approximation, we derive an analytical formula for $T_{c}$ which agrees well with exact numerical solutions of the Eliashberg equations for a broad range of parameters. Based on both numerical and analytical results, we predict a strong enhancement of the isotope effect when the frequencies of spin fluctuation and phonons are of the same order. This effect may have important consequences for near-magnetic superconductors such as MgCNi$_{3}$

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

Critical temperature and giant isotope effect in presence of paramagnons 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 Critical temperature and giant isotope effect in presence of paramagnons, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Critical temperature and giant isotope effect in presence of paramagnons will most certainly appreciate the feedback.

Rate now

     

Profile ID: LFWR-SCP-O-288542

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