Kigook Song, Robert D. Miller, et al.
Macromolecules
Data by Wiesmann et al. on the temperature coefficient of the upper critical field, dHc2(T)dT, and the normal-state resistivity ρ0 near the superconducting transition temperature Tc are analyzed to estimate the bare density of states N(EF) as a function of structural disorder and Tc in various α-particle irradiated samples of A-15 Nb3Ge and Nb3Sn. By taking into account the change in the electron-phonon coupling strength with Tc and the effect of mass enhancement arising from the electron-phonon interaction, the results of the new analysis indicate that (i) the drop in N(EF) for Nb3Ge is relatively small as Tc changes from ∼ 21 to ∼ 4 K, in agreement with a recent low-temperature specific-heat measurement; (ii) the value of N(EF) in Nb3Sn decreases by a factor of ∼ 4 as Tc varies from ∼ 18 to ∼ 3 K. The implication of these findings is discussed in terms of the origin of high-Tc superconductivity in A-15 compounds. © 1978 The American Physical Society.
Kigook Song, Robert D. Miller, et al.
Macromolecules
David B. Mitzi
Journal of Materials Chemistry
William Hinsberg, Joy Cheng, et al.
SPIE Advanced Lithography 2010
P. Martensson, R.M. Feenstra
Journal of Vacuum Science and Technology A: Vacuum, Surfaces and Films