Related papers: Superconductivity at 49 K in copper doping magnesi…
This paper has been withdrawn by the authors, because of serious experimental problems.
This paper has been withdrawn by the author due to time-consuming revision.
This paper is withdrawn by the authors.
This paper has been withdrawn by the author.
This paper has been withdrawn by the author due to obtaining a new set of tranport data.
This paper was withdrawn because subsequent measurements produced results not always consistent with the ones presented in the paper.
Magnesium diboride has been thermally treated in the presence of Rb, Cs, and Ba. Magnetic susceptibility shows onsets of superconductivity in the resulting samples at 52K (Rb), 58K (Cs) and 45K (Ba). Room-temperature 11B NMR indicates to…
The paper has been withdrawn due to very low reproducibility. About 100 samples have been made, only 3 samples show the superconducting-like behavior. We think it may be an unlikely result.
The paper is withdrawn.
This paper has been withdrawn by the authors
After receiving a number of comments and reviews from our colleagues who have suggested that our results could be greatly improved by other methods of extrapolation, we have decided to withdraw our paper entitled "Absence of…
%auto-ignore This paper has been withdrawn by the authors because its results have been superceded by new experimental data and new theory presented in S.-K. Mo et al., cond-mat/0212110.
This paper has been withdrawn by the authors due to new experimental results.
Short discussion trying to explain, why superconductivity revealed for some diborides is not always confirmed in experiments of different research groups.
This paper has been withdrawn.
Unlike the widely studied $s$-type two-gap superconductor MgB$_2$, the chemically similar compounds ZrB$_2$ and HfB$_2$ do not superconduct above 1 K. Yet, it has been shown that small amounts of self- or extrinsic doping (in particular…
Over the past 14 years MgB2 has gone from a startling discovery to a promising, applied superconductor. In this article we present a brief overview of the synthesis and the basic superconducting properties of this remarkable compound. In…
This paper has been withdrawn by the authors.
This paper has been withdrawn by the author
In this work we review our present understanding of superconductivity in Magnesium Diboride from the theoretical perspective as it evolves from band structure calculations. Particular emphasis is placed on two gap superconductivity. Some of…