Influence of a magnetic field on superconducting fluctuations above <i>T</i> <i>c</i> in cold-deposited indium films doped with hydrogen or oxygen

In this paper we investigate how a magnetic field affects the transition we detected earlier1 from two-dimensional to zero-dimensional fluctuations of the order parameter with increasing temperature in the region T &amp;gt; Tc for cold-deposited indium films containing hydrogen or oxygen impurities. The investigations show that as the magnetic field increases the critical region of zero-dimensional fluctuations grows in size and the reduced temperature ϵt(H) = ln(T/Tc) of this transition decreases, i.e., the temperature range in which two-dimensional fluctuations exist decreases. This behavior is consistent with the theoretically predicted change in the dimensionality of the fluctuations under the influence of the magnetic field.

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