title: Analysis of H(c2)(θ,T) for Mg(B(1-x)C(x))(2) single crystals by using the dirty two-gap model.
abstract: To understand the effect of carbon doping on the superconductivity in MgB(2), we obtained the angle- and temperature-dependent upper critical fields [H(c2)(θ) and H(c2)(T)] for Mg(B(1-x)C(x))(2) single crystals (x = 0.06 and 0.1) from resistivity measurements while varying the temperature, the field, and the direction of the field. The detailed values of the diffusivity for two different directions for each σ-band and π-band were obtained to explain both the temperature- and the angle-dependent H(c2) by using the dirty-limit two-gap model. The induced impurity scattering of the σ-band and the π-band for both the ab-plane and the c-direction is studied.
authors.affiliation: National Creative Research Initiative Center for Superconductivity and Department of Physics, Pohang University of Science and Technology, Pohang 790-784, Republic of Korea.
authors.forename: Min-Seok
authors.initials: MS
authors.lastname: Park
authors.forename: Hyun-Sook
authors.initials: HS
authors.lastname: Lee
authors.forename: Jung-Dae
authors.initials: JD
authors.lastname: Kim
authors.forename: Heon-Jung
authors.initials: HJ
authors.lastname: Kim
authors.forename: Myung-Hwa
authors.initials: MH
authors.lastname: Jung
authors.forename: Younghun
authors.initials: Y
authors.lastname: Jo
authors.forename: Sung-Ik
authors.initials: SI
authors.lastname: Lee