The Puzzling Collapse of Electronic Sliding Friction on a Superconductor Surface
نویسنده
چکیده
B.N.J. Persson and E. Tosatti 1 Institut für Festkörperforschung, Forschungszentrum Jülich, D–52425 Jülich, Germany International School for Advanced Studies (SISSA), Via Beirut 2, I-34014 Trieste, Italy, and Istituto Nazionale di Fisica della Materia (INFM), Trieste, (Italy), and Abdus Salam International Center for Theoretical Physics (ASICTP), P.O. Box 586, I-34014 Trieste, Italy ABSTRACT In a recent paper [Phys. Rev. Lett. 80 (1998) 1690], Krim and coworkers have observed that the friction force, acting on a thin physisorbed layer of N2 sliding on a lead film, abruptly decreases by a factor of∼ 2 when the lead film is cooled below its superconductivity transition temperature. We discuss the possible mechanisms for the abruptness of the sliding friction drop, and also discuss the relevance of these results to the problem of electronic friction.
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