Magnetic field induced finite size effect in type-II superconductors

Details Magnetic field induced finite size effect in type-II superconductors Magnetic field induced finite size effect in type-II superconductors

2005-10-13

arxiv.org/abs/cond-mat/0510336v1

Physics

Condensed Matter

Superconductivity

8 pages, 4 figures

Scientific paper

10.1063/1.2199441

We explore the occurrence of a magnetic field induced finite size effect on the specific heat and correlation lengths of anisotropic type-II superconductors near the zero field transition temperature Tc. Since near the zero field transition thermal fluctuations are expected to dominate and with increasing field strength these fluctuations become one dimensional, whereupon the effect of fluctuations increases, it appears unavoidable to account for thermal fluctuations. Invoking the scaling theory of critical phenomena it is shown that the specific heat data of nearly optimally doped YBa2Cu3O7-x are inconsistent with the traditional mean-field and lowest Landau level predictions of a continuous superconductor to normal state transition along an upper critical field Hc2(T). On the contrary, we observe agreement with a magnetic field induced finite size effect, whereupon even the correlation length longitudinal to the applied field H cannot grow beyond the limiting magnetic length L(H). It arises because with increasing magnetic field the density of vortex lines becomes greater, but this cannot continue indefinitely. L(H) is then roughly set on the proximity of vortex lines by the overlapping of their cores. Thus, the shift and the rounding of the specific heat peak in an applied field is traced back to a magnetic field induced finite size effect in the correlation length longitudinal to the applied field.

Affiliated with

Also associated with

No associations

Rating

Magnetic field induced finite size effect in type-II superconductors 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 Magnetic field induced finite size effect in type-II superconductors, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Magnetic field induced finite size effect in type-II superconductors will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFWR-SCP-O-470450