Year: 2001
Type: article
Abstract: We report the preparation method of and boron isotope effect for ${\mathrm{MgB}}_{2}$, a new binary intermetallic superconductor with a remarkably high superconducting transition temperature ${T}_{c}{(}^{10}\mathrm{B})\phantom{\rule{0ex}{0ex}}=\phantom{\rule{0ex}{0ex}}40.2\mathrm{K}$. Measurements of both temperature dependent magnetization and specific heat reveal a 1.0 K shift in ${T}_{c}$ between ${\mathrm{Mg}}^{11}{\mathrm{B}}_{2}$ and ${\mathrm{Mg}}^{10}{\mathrm{B}}_{2}$. Whereas such a high transition temperature might imply exotic coupling mechanisms, the boron isotope effect in ${\mathrm{MgB}}_{2}$ is consistent with the material being a phonon-mediated BCS superconductor.
Source: Physical Review Letters
Authors: S. L. Bud'ko, G. Lapertot, C. Petrovic, C. E. Cunningham, N. Anderson, P. C. Canfield
Institutions: Iowa State University, Ames National Laboratory
Language: Latvian
Subfield: Condensed Matter Physics
Field: Physics and Astronomy
Domain: Physical Sciences
Open Access status: green
OpenAlex ID: W1998218645