Absence of a boron isotope effect in the magnetic penetration depth of MgB$_{2}$

Details Absence of a boron isotope effect in the magnetic penetration depth of MgB$_{2}$ Absence of a boron isotope effect in the magnetic penetration depth of MgB$_{2}$

2003-07-14

arxiv.org/abs/cond-mat/0307330v2

Phys. Rev. B 70, 014519 (2004)

Physics

Condensed Matter

Superconductivity

5 pages, 3 figures, 1 table

Scientific paper

10.1103/PhysRevB.70.014519

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 boron isotope effect on the penetration depth $\lambda(0)$ was found within experimental error: $\Delta\lambda(0)/\lambda(0) = -0.8(8)%$, suggesting that MgB$_{2}$ is an adiabatic superconductor. This is in contrast to the substantial oxygen isotope effect on $\lambda(0)$ observed in cuprate high-temperature superconductors.

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