Scanning Josephson spectroscopy on the atomic scale

Abstract

The Josephson effect provides a direct method to probe the strength of the pairing interaction in superconductors. By measuring the phase fluctuating Josephson current between a superconducting tip of a scanning tunneling microscope (STM) and a BCS superconductor with isolated magnetic adatoms on its surface, we demonstrate that the spatial variation of the pairing order parameter can be characterized on the atomic scale. This system provides an example where the local pairing potential suppression is not directly reflected in the spectra measured via quasipartcile tunneling. Spectroscopy with such superconducting tips also show signatures of previously unexplored Andreev processes through individual impurity-bound Shiba states. The atomic resolution achieved here establishes scanning Josephson spectroscopy as a promising technique for the study of novel superconducting phases.

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Cited by in corpus (48)

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• Discovery of a Cooper-Pair Density Wave State in a Transition-Metal Dichalcogenide
• Mapping the orbital structure of impurity bound states in a superconductor
• Detection of a Pair Density Wave State in UTe${}_2$
• Chiral kagome superconductivity modulations with residual Fermi arcs in KV3Sb5 and CsV3Sb5
• Topological Superconductivity in Skyrmion Lattices
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• Photon-assisted tunneling at the atomic scale: Probing resonant Andreev reflections from Yu-Shiba-Rusinov states
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• Correlating Josephson supercurrents and Shiba states in quantum spins unconventionally coupled to superconductors
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• Imaging doubled shot noise in a Josephson scanning tunneling microscope
• Unconventional superconductivity from magnetism in transition metal dichalcogenide
• Tunneling processes between Yu-Shiba-Rusinov bound states
• Realizing Topological Superconductivity in Tunable Bose-Fermi Mixtures with Transition Metal Dichalcogenide Heterostructures
• Magnetic impurities in spin-split superconductors
• Superconducting proximity effect and order parameter fluctuations in disordered and quasiperiodic systems
• Imaging the Spatial Form of a Superconducting Order Parameter via Josephson Scanning Tunneling Spectroscopy
• Single Channel Josephson Effect in a High Transmission Atomic Contact
• Friedel oscillations and Majorana zero modes in inhomogeneous superconductors
• Josephson Scanning Tunneling Spectroscopy in $d_{x^2-y^2}$-wave superconductors: a probe for the nature of the pseudo-gap in the cuprate superconductors
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• Yu-Shiba-Rusinov states of single magnetic molecule in an $s-wave$ superconductor
• Full Counting Statistics of Yu-Shiba-Rusinov Bound States
• Statistical detection of Josephson, Andreev, and single quasiparticle currents in scanning tunneling microscopy
• Stoichiometric FeTe is a Superconductor
• Odd-frequency pairing in a superconductor coupled to two parallel nanowires
• Atomic-scale Frustrated Josephson Coupling and Multi-condensate Visualization in FeSe
• calcQPI: A versatile tool to simulate quasiparticle interference
• Quasiclassical circuit-theory of contiguous disordered multiband superconductors
• Microscopic theory of pair density waves in spin-orbit coupled Kondo lattice
• Local spectroscopies across the superconductor-insulator transition
• The feedback driven atomic scale Josephson microscope
• Theory of Josephson scanning microscopy with $s$-wave tip on unconventional superconducting surface: application to Bi${}_2$Sr${}_2$CaCu${}_2$O${}_{8+\delta }$
• Yu-Shiba-Rusinov bound states boost odd-frequency superconductivity
• Impurity bands in magnetic superconductors with spin density wave
• Casimir effect in Josephson junctions
• Spin-dependent tunneling between individual superconducting bound states
• Josephson spectroscopy study of kagome superconductors toward the deep point-contact regime
• Detecting and Distinguishing Majorana Zero Modes with the Scanning Tunneling Microscope