Magnetic Field Enhancement of the c-Axis Resistivity Peak near Tc in Layered Superconductors
Dorin V.V., Klernin R.A., Varlamov A.A., Buzdin A.I., Livanov D.V.
The contributions to the c-axis conductivity from fluctuations of the normal quasiparticle density of states are opposite in sign to the Aslamazov Larkin and Maki Thompson contributions, leading to a' peak in the overall c-axis resistivity pc(T) above Tc. In a magnetic field H||c, this peak increases in magnitude and is shifted to lower Τ by an amount proportional to H2 for weak fields and to Η for strong fields. Our results are discussed in regard to recent experiments with YBa2Cu307_# and Bi2Sr2CaCu208_M.