2001/07/30 by Andrew P. Iyengar, Andrew Iyengar, Ying-Jer Kao +2
Materials Science · Physics and Astronomy · #Magnetic properties of thin films #Physics of Superconductivity and Magnetism #ZnO doping and properties #cond-mat.str-el
paper · pdf · doi:10.1016/s0022-3697(02)00222-6
published as J. Phys. Chem. Solids 63, 2349 (2002) · 6 pages, 1 figure, elsart.cls included. Submitted to the proceeding of SNS 2001, Chicago
arxiv created 2001/07/30 · openalex publication_date 2002/12/01 · arxiv updated 2009/11/30 · openalex created_date 2016/06/24 · openalex updated_date 2026/07/28
We demonstrate that the observed dependences of Tc and T^* on small magnetic fields can be readily understood in a precursor superconductivity approach to the pseudogap phase. In this approach, the presence of a pseudogap at Tc (but not at T^*) and the associated suppression of the density of states lead to very different sensitivities to pair-breaking perturbations for the two temperatures. Our semi-quantitative results address the puzzling experimental observation that the coherence length ξ is weakly dependent on hole concentration x throughout most of the phase diagram. We present our results in a form which can be compared with the recent experiments of Shibauchi et al, and argue that orbital effects contribute in an important way to the H dependence of T^*.