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Related Experiment Video

Updated: Jun 3, 2026

Evaluating Plasmonic Transport in Current-carrying Silver Nanowires

Evaluating Plasmonic Transport in Current-carrying Silver Nanowires

Published on: December 11, 2013

Confinement and correlation effects on plasmons in an atom-scale metallic wire.

R K Moudgil¹, Vinayak Garg, K N Pathak

¹Department of Physics, Kurukshetra University, Kurukshetra, India. rkmoudgil13@gmail.com

Journal of Physics. Condensed Matter : an Institute of Physics Journal

|March 11, 2011

Summary

Investigating atom-scale metallic wires reveals confinement and electron correlations significantly impact plasmon dispersion. Wire structure critically influences these effects, matching experimental data.

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Area of Science:

Condensed Matter Physics
Materials Science
Nanotechnology

Background:

Plasmon dispersion in metallic nanostructures is crucial for understanding their optical and electronic properties.
Previous models often simplified electron correlations and confinement effects in low-dimensional systems.

Purpose of the Study:

To investigate the influence of confinement and electron correlations on plasmon dispersion in atom-scale metallic wires.
To compare theoretical predictions with experimental measurements of plasmon behavior.

Main Methods:

Modeled wire electrons as a quasi-one-dimensional homogeneous gas with varying transverse confinement.
Calculated the electron density response function including electron correlations beyond the random-phase approximation (RPA).
Employed the self-consistent mean-field approach developed by Singwi et al. (1968).

Main Results:

Achieved excellent agreement between theoretical plasmon dispersion and experimental electron-energy-loss spectroscopy (EELS) data.
Demonstrated a strong dependence of plasmon dispersion on the confinement model and electronic band structure.
Highlighted the significant role of electron effective mass in plasmon behavior.

Conclusions:

The study confirms the importance of electron correlations and confinement in atom-scale metallic wires.
Theoretical predictions align well with experimental findings, validating the employed methodology.
The wire structure, including its electronic band and effective mass, plays a critical role in determining plasmon dispersion.