Absence of a boron isotope effect in the magnetic penetration depth of MgB${}_2$

D. Di Castro, M. Angst, D. G. Eshchenko +11

The magnetic penetration depth $\lambda (0)$ in polycrystalline MgB${}_2$ for different boron isotopes (${}^{10}$B/${}^{11}$B) was investigated by transverse field muon spin rotation. No boro…