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Updated: Jun 14, 2026
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Advanced Experimental Methods for Low-temperature Magnetotransport Measurement of Novel Materials
Published on: January 21, 2016
Experimental study of the jamming transition at zero temperature.
1Department of Physics, The University of Chicago, James Franck Institute, Chicago, Illinois 60637, USA. xc92@cornell.edu
Summary
This study reveals a structural signature for jamming transitions in granular systems. A peak in particle correlations signals jamming, with cluster size reaching system limits near this point.
Area of Science:
- Physics
- Materials Science
- Complex Systems
Background:
- Granular materials exhibit complex behaviors, including jamming transitions.
- Understanding jamming is crucial for diverse applications, from industrial processes to geophysical phenomena.
Purpose of the Study:
- To experimentally identify structural signatures of the jamming transition in quasi-two-dimensional granular systems.
- To investigate the role of particle swelling and system inhomogeneity on jamming.
- To analyze cluster development and force chain dynamics during jamming.
Main Methods:
- Utilizing a quasi-two-dimensional granular system with automatically swelling particles.
- Analyzing pair correlation functions to identify structural changes.
- Characterizing cluster formation and static length scales.
- Investigating the influence of friction in inhomogeneous systems.
Main Results:
- A maximum in the first peak of the pair correlation function serves as a jamming signature at zero temperature.
- This signature is observed in the second, but not the third, peak, indicating jamming transition singularity.
- The static length scale of clusters grows to the system size near the jamming point.
- Friction-induced stepwise jamming and force chain buckling observed in inhomogeneous systems.
Conclusions:
- The pair correlation function provides a reliable indicator of jamming transitions in granular systems.
- System-spanning clusters and force chain buckling are key features of jamming, especially under inhomogeneous conditions.
- Experimental findings offer insights into the fundamental physics of jamming transitions.
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