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

Abstract

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.

arXiv comment5 pages, 3 figures, 1 table

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Cited by in corpus (9)

• Anomalous electron-phonon coupling probed on the surface of ZrB${}_{12}$ superconductor
• Polaronic and nonadiabatic phase diagram from anomalous isotope effects
• Anisotropy and internal field distribution of MgB2 in the mixed state at low temperatures
• Multi-Band Superconductivity and the Steep Band -- Flat Band Scenario
• Pressure and isotope effect on the anisotropy of MgB${}_2$
• Pressure effect on the in-plane magnetic penetration depth in YBa_2Cu_4O_8
• Study of pressure effect on the magnetic penetration depth in MgB${}_2$
• Isotope effect on the superfluid density in conventional and high-temperature superconductors
• Fermi arcs and isotope effect of the magnetic penetration depth in underdoped cuprates