Phys. Rev. B 51, 1112–1116 (1995)Enhancement of electron-phonon interactions in the nonequilibrium solid solutions Al1-xSixReceived 11 July 1994; published in the issue dated 1 January 1995 We report unusual behavior of the low-temperature electrical resistivity ρ of nonequilibrium substitutional solid solutions of the form Al1-xSix. This behavior is thought to be similar to anomalies in d2I/dV2 observed in the tunneling or point-contact spectra of metals in the presence of disorder, and to result from strong electron-phonon interactions. The resistivity data, along with low-temperature heatcapacity measurements and Al LII-III x-ray-emission spectroscopy and NMR Knight shift experiments, strongly suggest that an enhancement of the electron-phonon interactions due to lattice instabilities is the main reason for the dramatic increase in the superconducting transition temperature Tc to ∼11 K in Al1-xSix when x=0.2. © 1995 The American Physical Society URL:
http://link.aps.org/doi/10.1103/PhysRevB.51.1112
DOI:
10.1103/PhysRevB.51.1112
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