期刊
PHYSICAL REVIEW LETTERS
卷 86, 期 24, 页码 5582-5584出版社
AMER PHYSICAL SOC
DOI: 10.1103/physrevlett.86.5582
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We report on tunneling spectroscopy experiments in small grains of the new binary intermetallic superconductor MgB2. Experiments have been performed at 2.5 K using a low temperature scanning tunneling microscope. Good fit to the BCS model is obtained, with a gap value of 2 meV. In the framework of this model, this value should correspond to a surface critical temperature of 13.3 K. No evidence of gap anisotropy has been found.
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