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Updated: Jul 12, 2026

Probe Type II Band Alignment in One-Dimensional Van Der Waals Heterostructures Using First-Principles Calculations

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Real-Space Dynamic Electron Correlation in Beryllium.

Rudra B Bista¹, Yuya Shinohara², Wojciech Dmowski³

¹The University of Tennessee, Department of Physics and Astronomy, Knoxville, Knoxville, Tennessee 37996, USA.

Physical Review Letters

|July 10, 2026

Summary

This summary is machine-generated.

This study experimentally measures dynamic electron correlation in beryllium using inelastic X-ray scattering. Results confirm theoretical predictions for the exchange-correlation hole size and reveal its extension due to plasmon states.

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Published on: January 25, 2020

Area of Science:

Condensed Matter Physics
Materials Science
Quantum Chemistry

Background:

Electron correlation significantly influences solid-state material properties.
Experimental investigations into electron correlation in solids are limited, with theory dominating the field.

Purpose of the Study:

To experimentally measure the dynamic electron correlation function in solids.
To investigate the spatial extent and behavior of the exchange-correlation hole.

Main Methods:

Inelastic X-ray scattering (IXS) was employed on polycrystalline beryllium.
Data were analyzed to obtain the energy-resolved dynamic pair-distribution function.

Main Results:

The study successfully measured the dynamic electron correlation function.
The exchange-correlation hole size was confirmed to be approximately 2 Å, aligning with theoretical models.
At plasmon energies (~21 eV), the exchange-correlation hole was observed to extend to 4-5 Å.

Conclusions:

Dynamic electron correlation can be experimentally quantified using IXS.
The extended exchange-correlation hole at plasmon energies highlights the significant role of dynamic plasmon states.