Title: Leggett’s mode in Mg1− x AlxB2.
Authors: Ponomarev, Ya. G.; Kuzmichev, S. A.; Mikheev, M. G.; Sudakova, M. V.; Tchesnokov, S. N.; Hoang Hoai Van; Bulychev, B. M.; Maksimov, E. G.; Krasnosvobodtsev, S. I.
Abstract: A detailed investigation of multiband superconductivity and Leggett’s mode in the Mg1− x AlxB2 (0 ≤ x ≤ 0.45) system was carried out using tunneling and Andreev spectroscopy. Temperature dependences of superconducting gaps Δσ and Δπ and their variation upon the degree of disorder and the Al concentration were studied. The dependence of the Leggett’s mode energy ε0 upon the values of the gaps Δσ and Δπ has been derived.
Subjects: CONDUCTIVITY of electrolytes; SUPERCONDUCTING composites; TUNNEL design & construction; THERMODYNAMICS; SCIENTIFIC method; SPECTRUM analysis
Publication: JETP Letters, 2007, Vol 85, Issue 1, p46
ISSN: 0021-3640
Publication type: Academic Journal
DOI: 10.1134/S0021364007010092

Leggett’s mode in Mg<sub>1− x </sub>Al<sub>x</sub>B<sub>2</sub>.

Ponomarev, Ya. G.; Kuzmichev, S. A.; Mikheev, M. G.; Sudakova, M. V.; Tchesnokov, S. N.; Hoang Hoai Van; Bulychev, B. M.; Maksimov, E. G.; Krasnosvobodtsev, S. I.