Physics – Condensed Matter – Superconductivity
Scientific paper
1999-02-22
Phy. Rev. B, Volume 60, Issue 13, 9704 (1999).
Physics
Condensed Matter
Superconductivity
20 pages, Latex file, three figures
Scientific paper
10.1103/PhysRevB.60.9704
Higher than the lowest Landau level contributions to magnetization and specific heat of superconductors are calculated using Ginzburg - Landau equations approach. Corrections to the excitation spectrum around solution of these equations (treated perturbatively) are found. Due to symmetries of the problem leading to numerous cancellations the range of validity of the LLL approximation in mean field is much wider then a naive range and extends all the way down to $H = {H_{c2}(T)}/13$. Moreover the contribution of higher Landau levels is significantly smaller compared to LLL than expected naively. We show that like the LLL part the lattice excitation spectrum at small quasimomenta is softer than that of usual acoustic phonons. This enhanses the effect of fluctuations. The mean field calculation extends to third order, while the fluctuation contribution due to HLL is to one loop. This complements the earlier calculation of the LLL part to two loop order.
Li Dingping
Rosenstein Baruch
No associations
LandOfFree
Why the lowest Landau level approximation works in strongly 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 Why the lowest Landau level approximation works in strongly type II superconductors, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Why the lowest Landau level approximation works in strongly type II superconductors will most certainly appreciate the feedback.
Profile ID: LFWR-SCP-O-66949