Year: 2008
Type: article
Abstract: Recent investigations have shown that the first proposed explanations of the disagreement between experimental and theoretical values of isotope coefficient in ${\text{MgB}}_{2}$ need to be reconsidered. Considering that in samples with residual resistivity of few $\ensuremath{\mu}\ensuremath{\Omega}\text{ }\text{cm}$ critical temperature variations produced by disorder effects can be comparable with variations due to the isotopic effect, we adopt a procedure in evaluating the B isotope coefficient, which takes account of these effects, obtaining a value, which is in agreement with previous results, and then confirming that there is something still unclear in the physics of ${\text{MgB}}_{2}$.
Source: Physical Review B
Institution: University of Genoa
Language: Latvian
Subfield: Condensed Matter Physics
Field: Physics and Astronomy
Domain: Physical Sciences
Open Access status: green
OpenAlex ID: W2033610839