Scanning Tunnelling Spectroscopy of Vortices with Normal and Superconducting tips

Rodrigo, José A.; Suderow, Hermann; Vieira, S.

doi:10.1007/978-3-642-15137-8_10

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Scanning Andreev Reflection1

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2012

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“…Superconducting tips also allow, on the other hand, to probe the Josephson effect at the local level [30,40,41], and they could enable designing, in future, local phase sensitive experiments [2,42].…”

Section: Scanning Andreev Reflectionmentioning

confidence: 99%

Scanning microscopies of superconductors at very low temperatures

Crespo¹,

Galvis²,

Kulkarni³

et al. 2012

Physica C: Superconductivity

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We discuss basics of scanning tunneling microscopy and spectroscopy (STM/S) of the superconducting state with normal and superconducting tips. We present a new method to measure the local variations in the Andreev reflection amplitude between a superconducting tip and the sample. This method is termed Scanning Andreev Reflection Spectroscopy (SAS). We also briefly discuss vortex imaging with STM/S under an applied current through the sample, and show the vortex lattice as a function of the angle between the magnetic field and sample's surface.

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