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Metallic Solids

Metallic Solids

Metallic solids such as crystals of copper, aluminum, and iron are formed by metal atoms. The structure of metallic crystals is often described as a uniform distribution of atomic nuclei within a “sea” of delocalized electrons. The atoms within such a metallic solid are held together by a unique force known as metallic bonding that gives rise to many useful and varied bulk properties.
All metallic solids exhibit high thermal and electrical conductivity, metallic luster, and malleability....

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Updated: Apr 11, 2026

Probing C84-embedded Si Substrate Using Scanning Probe Microscopy and Molecular Dynamics

Probing C84-embedded Si Substrate Using Scanning Probe Microscopy and Molecular Dynamics

Published on: September 28, 2016

Two-dimensional silicon monolayers generated on c-BN(111) substrate.

Haiping Wu¹, Yan Qian, Shaohua Lu

¹State Key Laboratory of Superhard Materials, Jilin University, Changchun, 130012, China. mym@jlu.edu.cn.

Physical Chemistry Chemical Physics : PCCP

|June 3, 2015

Summary

This summary is machine-generated.

Researchers synthesized novel 2D silicon structures on c-BN(111) with Dirac points, offering new possibilities for massless Dirac fermion transport. This expands the search for unique two-dimensional silicon materials.

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Area of Science:

Materials Science
Condensed Matter Physics
Nanotechnology

Background:

Silicene, a 2D silicon allotrope, is challenging to synthesize with desired electronic properties.
Achieving a Dirac point in silicene is crucial for applications but has been limited to specific substrates like Ag(111).

Purpose of the Study:

To explore new two-dimensional silicon structures with Dirac points.
To investigate silicon monolayers on a c-BN(111) substrate for unique electronic properties.

Main Methods:

Utilized particle-swarm optimization (CALYPSO code) to generate novel Si monolayer structures.
Performed band structure calculations to analyze electronic properties.

Main Results:

Successfully generated three distinct Si monolayer structures on c-BN(111).
All structures exhibited metallic behavior.
Two structures displayed flat conformations with linear dispersion near the Fermi level, indicating massless Dirac fermion behavior.

Conclusions:

The findings present a new pathway for discovering 2D silicon materials with Dirac points.
This research broadens the scope beyond Ag(111) for synthesizing silicene-like materials with unique electronic characteristics.