Abstract:
A detailed investigation of multiband superconductivity and Leggett's mode in the Mg1−x1−xAlxxB22(0≤x≤0.45)(0≤x≤0.45) system was carried out using tunneling and Andreev spectroscopy. Temperature dependences of superconducting gaps ΔσΔσ and ΔπΔπ and their variation upon the degree of disorder and the Al concentration were studied. The dependence of the Leggett's mode energy ε0ε0 upon the values of the gaps ΔσΔσ and ΔπΔπ has been derived.
Citation:
Ya. G. Ponomarev, S. A. Kuzmichev, M. G. Mikheev, M. V. Sudakova, S. N. Chesnokov, H. V. Hoang, B. M. Bulychev, E. G. Maksimov, S. I. Krasnosvobodtsev, “Leggett's Mode in Mg1−x1−xAlxxB22”, Pis'ma v Zh. Èksper. Teoret. Fiz., 85:1 (2007), 52–56; JETP Letters, 85:1 (2007), 46–50