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Electron localization and superconductivity in very thin epitaxially grown Ag films on Ge (001) |
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| Authors: | M.J. Burns J.R. Lince R.S. Williams P.M. Chaikin |
| Affiliation: | 1. Department of Physics University of California Los Angeles, California 90024, USA;2. Department of Chemistry and Biochemistry University of California Los Angeles, California 90024, USA;3. Dept. of Physics and Laboratory for Research on the Structure of Matter University of Pennsylvania, Phila. PA 19104, USA;4. Exxon Research and Engineering Co., Annandale, NJ 08801, USA |
| Abstract: | Transport properties of very thin (2.5 monolayer) films of Ag epitaxially grown on clean Ge (001) substrates are reported. The films consist of a monolayer coverage plus isolated three dimensional islands. Below ～70°K the conductivity is dominated by the metal film and displays the temperature and electric and magnetic field dependences characteristic of metallic weak localization in two dimensions. Below ～2°K the resistance drops rapidly in a manner resembling an incomplete superconducting transition. The resistance is restored by application of a magnetic field of ～20 KGauss at 0.6°K. |
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