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Observation of phase fluctuations and electron-electron scattering in weakly disordered superconducting aluminum films

1988; American Physical Society; Volume: 37; Issue: 13 Linguagem: Inglês

10.1103/physrevb.37.7911

1095-3795

Soon-Gul Lee, Thomas R. Lemberger,

Superconductivity in MgB2 and Alloys

Phase fluctuations and electron-electron scattering in weakly disordered, two-dimensional superconducting Al films have been observed through their effects on the resistance of low-resistance Al-${\mathrm{AlO}}_{\mathrm{x}}$-Cu tunnel junctions. These are the uniform-film analog of the fluctuations in percolating films and in Josephson junctions. Disorder-enhanced electron-electron scattering has the magnitude and temperature dependence expected theoretically.