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Related Concept Videos

Network Covalent Solids02:18

Network Covalent Solids

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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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sp3d and sp3d 2 Hybridization
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Crystal field theory (CFT) is applicable to molecules in geometries other than octahedral. In octahedral complexes, the lobes of the dx2−y2 and dz2 orbitals point directly at the ligands. For tetrahedral complexes, the d orbitals remain in place, but with only four ligands located between the axes. None of the orbitals points directly at the tetrahedral ligands. However, the dx2−y2 and dz2 orbitals (along the Cartesian axes) overlap with the ligands less than the dxy,...
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Heteronuclear single-quantum correlation spectroscopy (HSQC) is a 2D NMR technique that reveals one-bond correlations between hydrogen and a heteronucleus. The HSQC experiment is similar to the heteronuclear correlation experiment (HETCOR) but is more sensitive. In the HSQC spectrum, the proton chemical shift is plotted on the horizontal F2 axis, while the 13C chemical shift is plotted on the vertical F1 axis. The corresponding proton and 13C spectra are also shown. The HSQC contour plot does...
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Preparation of Large-area Vertical 2D Crystal Hetero-structures Through the Sulfurization of Transition Metal Films for Device Fabrication
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Carbon defect qubit in two-dimensional WS2.

Song Li1, Gergő Thiering1, Péter Udvarhelyi1

  • 1Wigner Research Centre for Physics, P.O. Box 49, Budapest, H-1525, Hungary.

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|March 9, 2022
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Summary
This summary is machine-generated.

Researchers engineered a single defect qubit in 2D semiconductors for quantum information. This defect shows potential for scalable quantum computing with a spin-photon interface.

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Area of Science:

  • Quantum computing and information science
  • Materials science and engineering
  • Condensed matter physics

Background:

  • Defect qubits in 2D semiconductors are crucial for quantum information and sensing.
  • Precise engineering of single defects is key for scalable quantum devices.

Purpose of the Study:

  • To investigate the electronic and optical properties of a specific defect qubit.
  • To assess the potential of this defect as a scalable qubit for quantum applications.

Main Methods:

  • First-principles calculations of electronic structure and optical properties.
  • Identification of defect charge states using scanning tunneling spectroscopy.
  • Analysis of spin-orbit coupling effects on excited states.

Main Results:

  • The neutral charge state of the defect was identified in scanning tunneling spectra.
  • Giant spin-orbit coupling leads to phosphorescence at telecom wavelengths.
  • Coherent microwave excitation is viable for spin manipulation.

Conclusions:

  • A scalable qubit in a 2D material with a telecom-wavelength spin-photon interface has been established.
  • This defect qubit shows promise for quantum information processing and sensing.