Quantum pressure focusing in solids: a reconstruction from experimental electron density

Area of Science:

• Solid-state physics
• Quantum chemistry
• Materials science

Background:

• Understanding electronic behavior in solids is crucial for materials science.
• Experimental electron density provides a basis for theoretical analysis.
• Quantum effects significantly influence material properties.

Purpose of the Study:

• To develop an approach for reconstructing electronic internal quantum pressure distribution in solids.
• To visualize quantum pressure variations and their impact on chemical bonding.
• To utilize experimental electron density data for theoretical insights.

Main Methods:

• Reconstruction of electronic internal quantum pressure from experimental electron density.
• Application of density functional theory (DFT) formalism.
• Development and use of the indicator of quantum pressure focusing (IQPF).

Main Results:

• A spatial map of quantum pressure within crystals was obtained.
• The IQPF effectively highlights regions of pressure concentration and depletion.
• IQPF integrates kinetic, exchange, and correlation effects, revealing quantum shell structure contributions.

Conclusions:

• The presented approach successfully maps electronic quantum pressure.
• IQPF provides a clear visualization of chemical bonding features in various crystal types.
• This method offers new insights into quantum effects governing material properties.