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Hybridization of Atomic Orbitals I03:24

Hybridization of Atomic Orbitals I

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The mathematical expression known as the wave function, ψ, contains information about each orbital and the wavelike properties of electrons in an isolated atom. When atoms are bound together in a molecule, the wave functions combine to produce new mathematical descriptions that have different shapes. This process of combining the wave functions for atomic orbitals is called hybridization and is mathematically accomplished by the linear combination of atomic orbitals. The new orbitals that...
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Coordination compounds and complexes exhibit different colors, geometries, and magnetic behavior, depending on the metal atom/ion and ligands from which they are composed. In an attempt to explain the bonding and structure of coordination complexes, Linus Pauling proposed the valence bond theory, or VBT, using the concepts of hybridization and the overlapping of the atomic orbitals. According to VBT, the central metal atom or ion (Lewis acid) hybridizes to provide empty orbitals of suitable...
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Network covalent solids contain a three-dimensional network of covalently bonded atoms as found in the crystal structures of nonmetals like diamond, graphite, silicon, and some covalent compounds, such as silicon dioxide (sand) and silicon carbide (carborundum, the abrasive on sandpaper). Many minerals have networks of covalent bonds.
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Hybridized Defects in Solid-State Materials as Artificial Molecules.

Derek S Wang1, Christopher J Ciccarino1,2, Johannes Flick3

  • 1Harvard John A. Paulson School of Engineering and Applied Sciences, Harvard University, Cambridge, Massachusetts 02138, United States.

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|February 18, 2021
PubMed
Summary
This summary is machine-generated.

Scientists created "artificial molecules" in 2D materials by precisely controlling quantum defects. This breakthrough allows tuning of optoelectronic properties for quantum information science applications.

Keywords:
artificial atomartificial moleculedefect centerhybridizationtwo-dimensional material

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Area of Science:

  • Materials Science
  • Quantum Physics
  • Chemistry

Background:

  • Two-dimensional materials allow atomic-scale engineering of quantum defects, termed
  • artificial atoms
  • , which function as spin qubits.
  • Understanding interactions between these artificial atoms is crucial for developing quantum technologies.

Purpose of the Study:

  • To investigate the formation and properties of
  • artificial molecules
  • in solids by controlling quantum defects.
  • To introduce a chemical degree of freedom for tuning quantum optoelectronic materials.

Main Methods:

  • Utilized monolayer hexagonal boron nitride as a model system.
  • Observed configuration- and distance-dependent defect orbital hybridization.
  • Calculated energetics of different defect pair configurations (e.g., CB-CB, CHB-CHB).

Main Results:

  • Demonstrated hybridization of defect orbitals into bonding and antibonding states with significant energy splitting.
  • Found that in-plane defect pairs exhibit stronger interactions than out-of-plane pairs.
  • Showed that varying defect distances (CB and VN) tunes optical absorption from visible to near-infrared.

Conclusions:

  • The chemical control of defect complexes offers a new pathway for engineering quantum materials.
  • This approach enables precise tuning of defect properties for applications in quantum memories and quantum emitters.
  • Highlights the potential for designing robust quantum information science devices.