Magnetic-field-independent superconductivity of ultrathin Pb films on cleaved GaAs surface
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چکیده
We performed magnetotransport measurements on ultathin Pb films deposited onto cleaved GaAs surface and observed two-dimensional superconductivity for an amorphous 2.2-Å-thick film, which is below one monolayer. The superconducting transition is almost independent of parallel magnetic field as high as 14 T. This means that the superconducting state has much larger critical magnetic field than Pauli paramagnetic limit. We consider two different mechanism relating Rashba spin splitting.
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تاریخ انتشار 2012