Boron isotope effect in superconducting MgB2 |
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| Authors: | Bud'ko S L Lapertot G Petrovic C Cunningham C E Anderson N Canfield P C |
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| Institution: | Ames Laboratory, Iowa State University, Ames, Iowa 50011, USA. |
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| Abstract: | We report the preparation method of and boron isotope effect for MgB2, a new binary intermetallic superconductor with a remarkably high superconducting transition temperature T(c)(10B) = 40.2 K. Measurements of both temperature dependent magnetization and specific heat reveal a 1.0 K shift in T(c) between Mg11B2 and Mg10B2. Whereas such a high transition temperature might imply exotic coupling mechanisms, the boron isotope effect in MgB2 is consistent with the material being a phonon-mediated BCS superconductor. |
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