Related Experiment Video
Updated: Sep 14, 2025

Visualizing Uniaxial-strain Manipulation of Antiferromagnetic Domains in Fe1+YTe Using a Spin-polarized Scanning Tunneling Microscope
Published on: March 24, 2019
Atomic-scale frustrated Josephson coupling and multicondensate visualization in FeSe
Nileema Sharma1,2, Matthew Toole1,2, James McKenzie1,2
1Department of Physics and Astronomy, University of Notre Dame, Notre Dame, IN, USA.
Researchers explored frustrated Josephson tunnelling in multiband superconductors using scanned Josephson tunnelling microscopy. They demonstrated tunable pathways and visualized anticorrelated superfluid modulations in FeSe, advancing multicondensate superconductivity research.
Area of Science:
- Condensed Matter Physics
- Superconductivity
Background:
- Multiband superconductors exhibit complex Josephson couplings, leading to frustrated superfluid densities.
- Frustrated coupling involves quantum interference tunable via channel transparency.
Purpose of the Study:
- To investigate frustrated Josephson tunnelling in the s±-wave superconductor FeSe.
- To utilize atomic-resolution scanned Josephson tunnelling microscopy for condensate-resolved imaging and tuning.
Main Methods:
- Employed atomic-resolution scanned Josephson tunnelling microscopy.
- Analyzed tunnelling inequalities to quantitatively demonstrate frustrated Josephson tunnelling.
- Tuned relative transparency of parallel tunnelling pathways.
Main Results:
- Demonstrated tunable relative transparency of tunnelling pathways in FeSe.
- Observed a tendency towards a 0-π transition with decreasing junction resistance.
- Visualized anticorrelated superfluid modulations between condensates, indicating interband scattering.
Conclusions:
- Scanned Josephson tunnelling microscopy provides unprecedented capabilities for studying multicondensate superconductivity.
- The study quantitatively confirms frustrated Josephson tunnelling in FeSe.
- Revealed insights into interband scattering effects in multiband superconductors.
More Related Videos
05:39Scalable Quantum Integrated Circuits on Superconducting Two-Dimensional Electron Gas Platform
Published on: August 2, 2019
08:12Ohmic Contact Fabrication Using a Focused-ion Beam Technique and Electrical Characterization for Layer Semiconductor Nanostructures
Published on: December 5, 2015
Related Concept Videos
Ferromagnetism
Crystal Field Theory - Octahedral Complexes
To explain the observed behavior of transition metal complexes (such as colors), a model involving electrostatic interactions between the electrons from the ligands and the electrons in the unhybridized d orbitals of the central metal atom has been developed. This electrostatic model is crystal field theory (CFT). It helps to understand, interpret, and predict the colors, magnetic behavior, and some structures of coordination compounds of transition metals.
CFT focuses on...
Spin–Spin Coupling: Two-Bond Coupling (Geminal Coupling)
The central atom need not be NMR-active because its electrons are affected by the electron polarization of the spin-active atoms. However, spin information is transmitted less effectively than in one-bond coupling, and 2J values are usually weaker than 1J values. The energy of...
Network Covalent Solids
To break or to melt a covalent network solid, covalent bonds must be broken. Because covalent bonds are relatively strong, covalent network solids are typically...
Fermi Level Dynamics
Electron affinity in semiconductors refers to the energy gap between the minimum of its conduction band and the vacuum level and it is a critical parameter in determining how easily a semiconductor can accept additional electrons.
The work...
Electron Microscope Tomography and Single-particle Reconstruction
Electron Tomography
Electron tomography can be performed either in TEM or STEM (scanning transmission...