Scanning microscopies of superconductors at very low temperatures

Abstract

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.

References in corpus (12)

• Scanning tunneling spectroscopy of high-temperature superconductors
• Imaging the Fano Lattice to 'Hidden Order' Transition in URu2Si2
• Visualizing the Formation of the Kondo Lattice and the Hidden Order in URu2Si2
• Direct observation of melting in a 2-D superconducting vortex lattice
• Coherence factors in a high-Tc cuprate probed by quasi-particle scattering off vortices
• Intrinsic atomic scale modulations of the superconducting gap of 2H-NbSe2
• Scanning Tunneling Spectroscopy on the novel superconductor CaC6
• Nodeless spin triplet superconducting gap in Sr2RuO4
• Vortex nanoliquid in high-temperature superconductors
• Local superconducting density of states of ErNi2B2C
• Scanning tunneling spectroscopy with superconducting tips of Al
• Evolution of the local superconducting density of states in ErRh${}_4$B${}_4$ close to the ferromagnetic transition

Cited by in corpus (4)

• Evidence for Majorana bound state in an iron-based superconductor
• Discovery of a Cooper-Pair Density Wave State in a Transition-Metal Dichalcogenide
• Imaging superconducting vortex core and lattice with the scanning tunneling microscope
• The Kondo Resonance Line Shape in Scanning Tunnelling Spectroscopy: Instrumental Aspects