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Related Experiment Video

Updated: Sep 17, 2025

Optimizing Magnetic Force Microscopy Resolution and Sensitivity to Visualize Nanoscale Magnetic Domains

Optimizing Magnetic Force Microscopy Resolution and Sensitivity to Visualize Nanoscale Magnetic Domains

Published on: July 20, 2022

Superconducting phase interference effect in momentum space.

Bo Zhan¹, Qiang Gao², Runze Chi³

¹Institute of Physics, Chinese Academy of Sciences, Beijing 100190, China; School of Physical Sciences, University of Chinese Academy of Sciences, Beijing 100049, China; ByteDance Research, Fangheng Fashion Center, Beijing 100098, China.

Science Bulletin

|July 1, 2025

Summary

This summary is machine-generated.

Researchers discovered a new way to detect superconducting phases by observing interference effects at specific points on Fermi surfaces. This method explains recent anomalies in high-temperature superconductors and offers new phase-probing techniques.

Keywords:

Angle-resolved photoemission spectroscopy Josephson junction Phase interference effect Superconductivity

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Area of Science:

Condensed Matter Physics
Materials Science
Quantum Mechanics

Background:

Detecting superconducting order parameter phases is crucial for understanding electron pairing symmetry.
Conventional methods rely on macroscopic Josephson effects, lacking microscopic phase information.
Microscopic phase interference in momentum space has been difficult to access.

Purpose of the Study:

To uncover a novel superconducting phase interference effect at microscopic levels.
To explain anomalies observed in the single-particle spectral function of superconductors.
To develop new methods for probing relative superconducting phases.

Main Methods:

Introducing hybridization between primary and replica bands.
Analyzing superconducting phase interference at Fermi surface intersection points.
Utilizing angle-resolved photoemission spectroscopy (ARPES) data.

Main Results:

A novel superconducting phase interference effect was identified at band intersection points.
This effect explains anomalies in the single-particle spectral function of Bi2212 superconductors.
The effect can also manifest in twisted superconductor junctions.

Conclusions:

The hybridization-induced interference offers a new microscopic probe for superconducting phases.
This finding provides insight into the pairing symmetry of superconductors.
The phenomenon has potential applications in probing relative phases in twisted superstructures.