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Updated: Jul 7, 2026
08:45
Fabrication of Spatially Confined Complex Oxides
Published on: July 1, 2013
Long-range order in electronic transport through disordered metal films
S Aigner1, L Della Pietra, Y Japha
1Physikalisches Institut, Universität Heidelberg, Philosophenweg 12, 69120 Heidelberg, Germany.
Science (New York, N.Y.)
|March 1, 2008
Summary
Ultracold atom magnetic field microscopy reveals organized current patterns in gold films. These patterns, oriented at +/-45 degrees, arise from universal scattering properties at defects, offering new insights into disorder and transport.
Area of Science:
- Condensed matter physics
- Materials science
- Quantum sensing
Background:
- Ultracold atom magnetic field microscopy offers high-sensitivity probing of current flow.
- Understanding charge transport in polycrystalline materials is crucial for electronic applications.
Purpose of the Study:
- To investigate current flow patterns in polycrystalline gold films using ultracold atom magnetometry.
- To explore the relationship between structural disorder and emergent current correlations.
Main Methods:
- Utilized ultracold atom magnetic field microscopy to image current flow in gold films.
- Analyzed the orientation and scale of current patterns relative to film microstructure.
- Quantified current direction fluctuations and their dependence on material properties.
Main Results:
- Observed long-range, organized current patterns oriented at +/-45 degrees to the mean current flow.
- These patterns persisted at room temperature and extended beyond diffusion length and grain size.
- The amplitude of current fluctuations showed an inverse scaling with thickness variations, grain size, and defect concentration.
Conclusions:
- Universal scattering properties at defects dictate the observed current pattern orientation.
- Ultracold atom magnetometry provides novel insights into the interplay of disorder and electronic transport.
- The findings advance the understanding of charge transport in disordered metallic systems.
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