Tunneling spectroscopy and magnetization measurements of the superconducting properties of MgB2 -: art. no. 220508

被引:99
作者
Sharoni, A [1 ]
Felner, I [1 ]
Millo, O [1 ]
机构
[1] Hebrew Univ Jerusalem, Racah Inst Phys, IL-91904 Jerusalem, Israel
关键词
D O I
10.1103/PhysRevB.63.220508
中图分类号
T [工业技术];
学科分类号
08 ;
摘要
Cryogenic scanning tunneling microscopy and magnetization measurements were used to study the superconducting properties of MgB2. The magnetization measurements show a sharp superconductor transition at T-c=39 K, in agreement with previous works. The tunneling spectra exhibit BCS-like gap structures, with gap parameters in the range of 5 to 7 meV, yielding a ratio of 2 Delta /k(B)T(c)similar to3-4. This suggests that MgB2 is a conventional BCS s-wave superconductor, either in the weak-coupling or in the "intermediate-coupling' regime.
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