Experimental evidence of two-band behavior of MgB2

Details Experimental evidence of two-band behavior of MgB2 Experimental evidence of two-band behavior of MgB2

2003-03-31

arxiv.org/abs/cond-mat/0303640v3

Sol. St. Comm. 129, 85 (2004)

Physics

Condensed Matter

Superconductivity

14 pages, 6 figures, 1 table; corrected typos and figs

Scientific paper

10.1016/j.ssc.2003.09.024

The break-junction tunneling has been systematically investigated in MgB2. Two types of the break-junction contacts have been exploited on the same samples, which demonstrated tunnel contact like (SIS) and point contact like (SnS) behavior. Both of them have shown the existence of the two distinct energy gaps. We have observed also the peculiarities on the I(V)- characteristics related to Leggett's collective mode assisted tunneling. --> Corresponding author address: kuzmichev@mig.phys.msu.ru

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