期刊
PHYSICAL REVIEW LETTERS
卷 97, 期 11, 页码 -出版社
AMERICAN PHYSICAL SOC
DOI: 10.1103/PhysRevLett.97.117001
关键词
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We study superconductivity suppression due to thermal fluctuations in disordered wires using the replica nonlinear sigma-model (NL sigma M). We show that in addition to the thermal phase slips there is another type of fluctuations that result in a finite resistivity. These fluctuations are described by saddle points in NL sigma M and cannot be treated within the Ginzburg-Landau approach. The contribution of such fluctuations to the wire resistivity is evaluated with exponential accuracy. The magnetoresistance associated with this contribution is negative.
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