Related Experiment Video
Updated: Oct 10, 2025
Ohmic Contact Fabrication Using a Focused-ion Beam Technique and Electrical Characterization for Layer Semiconductor Nanostructures
Published on: December 5, 2015
Tunable Single-Atomic Charges on a Cleaved Intercalated Transition Metal Dichalcogenide
Seongjoon Lim1, Shangke Pan1,2, Kefeng Wang1
1Rutgers Center for Emergent Materials and Department of Physics and Astronomy, Rutgers The State University of New Jersey, Piscataway, New Jersey 08854, United States.
Researchers created controllable atomic charges on a periodic lattice using metallic cobalt niobium disulfide (Co1/3NbS2). This breakthrough enables manipulation of atomic charges for advanced 2D electronics and spintronics applications.
Area of Science:
- Materials Science
- Condensed Matter Physics
- Surface Science
Background:
- Controlling single ionic charge states is crucial for atomic-scale interactions.
- Previous studies focused on artificially deposited materials on insulating layers.
Purpose of the Study:
- To demonstrate a method for obtaining a controllable layer of atomic charges on a periodic lattice.
- To explore the potential of intercalated transition metal dichalcogenides for novel electronic applications.
Main Methods:
- Cleaving metallic cobalt niobium disulfide (Co1/3NbS2) to expose a surface layer.
- Identifying and manipulating metastable charge states of cobalt atoms.
- Utilizing density functional theory (DFT) for theoretical investigation.
Main Results:
- Successfully obtained a layer of controllable atomic charges on a periodic lattice.
- Identified a metastable charge state of cobalt with a distinct valence.
- Manipulated these charges into a linear chain formation.
- DFT confirmed the stability of the surface charge state due to modified crystal fields.
Conclusions:
- Metallic Co1/3NbS2 provides a platform for controllable atomic charges.
- The findings suggest a new route for exploring single-atom-operational 2D electronics and spintronics.
- This approach is generalizable to other intercalated materials.
More Related Videos
08:50Preparation of Large-area Vertical 2D Crystal Hetero-structures Through the Sulfurization of Transition Metal Films for Device Fabrication
Published on: November 28, 2017
10:42Combining Solid-state and Solution-based Techniques: Synthesis and Reactivity of ChalcogenidoplumbatesII or IV
Published on: December 29, 2016
Related Concept Videos
02:46Crystal Field Theory - Tetrahedral and Square Planar Complexes
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,...
02:58Crystal Field Theory - Octahedral Complexes
To explain the observed behavior of transition metal complexes (such as colors), a model involving electrostatic interactions between the electrons from the ligands and the electrons in the unhybridized d orbitals of the central metal atom has been developed. This electrostatic model is crystal field theory (CFT). It helps to understand, interpret, and predict the colors, magnetic behavior, and some structures of coordination compounds of transition metals.
CFT focuses on...
02:42Valence Bond Theory
02:42Ionic Crystal Structures
Most monatomic ions behave as charged spheres, and their attraction for ions of opposite charge is the same in every direction. Consequently, stable structures for ionic compounds result (1) when ions of one charge are surrounded by as many ions as possible of the opposite...
03:02Colors and Magnetism
When atoms or molecules absorb light at the proper frequency, their electrons are excited to higher-energy orbitals. For many main group atoms and molecules, the absorbed photons are in the ultraviolet range of the electromagnetic spectrum, which cannot be detected by the human eye. For coordination compounds, the energy difference between the d orbitals often allows photons in the visible range to be absorbed and emitted, which is seen as colors by the human...
02:58Properties of Transition Metals