Mixed state in dirty two-band superconductors: application to MgB2

Share/Save/Bookmark

Golubov, A.A. and Koshelev, A.E. (2004) Mixed state in dirty two-band superconductors: application to MgB2. Physica C: Superconductivity, 408-41 . pp. 3385-340. ISSN 0921-4534

[img]PDF
Restricted to UT campus only
: Request a copy
260Kb
Abstract:We investigate a two-band superconductor with strong intraband and weak interband electronic scattering rates in the framework of coupled Usadel equations. We calculate the upper critical field for different field orientation. Due to a very large difference between the c-axis coherence lengths in two-bands, the GL theory is applicable only in the extremely narrow temperature range. This leads to the strong temperature dependence of the Hc2 anisotropy and large deviations of the angular dependence of Hc2 from a simple effective-mass law. In the case of field along c-direction we solved coupled nonlinear Usadel equations numerically to find field evolution of the pair potentials and local densities of states for two-bands. The existence of two distinct length and field scales corresponding to different bands is demonstrated.
Item Type:Article
Copyright:© 2004 Elsevier
Faculty:
Science and Technology (TNW)
Research Group:
Link to this item:http://purl.utwente.nl/publications/76269
Official URL:http://dx.doi.org/10.1016/j.physc.2004.02.150
Export this item as:BibTeX
EndNote
HTML Citation
Reference Manager

 

Repository Staff Only: item control page

Metis ID: 218674