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: [email protected]
@article{arxiv.cond-mat/0303640,
title = {Experimental evidence of two-band behavior of MgB2},
author = {Ya. G. Ponomarev and S. A. Kuzmichev and M. G. Mikheev and M. V. Sudakova and S. N. Tchesnokov and N. Z. Timergaleev and A. V. Yarigin and E. G. Maksimov and S. I. Krasnosvobodtsev and A. V. Varlashkin and M. A. Hein and G. Muller and H. Piel and L. G. Sevastyanova and O. V. Kravchenko and K. P. Burdina and B. M. Bulychev},
journal= {arXiv preprint arXiv:cond-mat/0303640},
year = {2010}
}
Comments
14 pages, 6 figures, 1 table; corrected typos and figs