Author/Authors :
Ponomarev، نويسنده , , Ya.G. and Kuzmichev، نويسنده , , S.A. and Mikheev، نويسنده , , M.G. and Sudakova، نويسنده , , M.V. and Tchesnokov، نويسنده , , S.N. and Timergaleev، نويسنده , , N.Z. and Yarigin، نويسنده , , A.V. and Maksimov، نويسنده , , E.G. and Krasnosvobodtsev، نويسنده , , S.I. and Varlashkin، نويسنده , , A.V. and Hein، نويسنده , , M.A. and Müller، نويسنده , , G. and Piel، نويسنده , , H. and Sevastyanova، نويسنده , , L.G. and Kravchenko، نويسنده , , O.V. and Burdina، نويسنده , , K.P. and Bulychev، نويسنده , , B.M.، نويسنده ,
Abstract :
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 also observed peculiarities on the I(V)- characteristics related to Leggettʹs collective mode assisted tunneling.
Keywords :
74.20.?z , 74.50.+r , D. Two-gap superconductivity , D. Multiple Andreev reflections , D. Tunneling , D. Leggettיs plasmon , 74.70.Ad
