Two-Channel Kondo Effects in Al-AlO$ {x}$-Sc Planar Tunnel Junctions - Condensed Matter > Mesoscale and Nanoscale PhysicsReportar como inadecuado




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Abstract: We have measured the differential conductances $GV,T$ in severalAl-AlO$ {x}$-Sc planar tunnel junctions between 2 and 35 K. As the temperaturedecreases to $\sim$ 16 K, the zero-bias conductance $G0,T$ crosses over froma standard $-$ln$T$ dependence to a novel $- \sqrt{T}$ dependence.Correspondingly, the finite bias conductance $GV,T$ reveals a two-channelKondo scaling behavior between $\sim$ 4 and 16 K. The observed two-channelKondo physics is ascribed to originating from a few localized spin-$\frac12$ Scatoms situated slightly inside the AlO$ x$-Sc interface.



Autor: Sheng-Shiuan Yeh, Juhn-Jong Lin

Fuente: https://arxiv.org/







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