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Updated: Jan 23, 2026
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Single-Molecule Imaging of Nuclear Transport
Published on: June 9, 2010
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Electronic and thermal spin transport in single-molecule junctions based on a spin-crossover Fe(II) complex
Yujie Hu1, Jing Huang2, Xia Bao1
1Anhui Engineering Research Center for Photoelectrocatalytic Electrode Materials, Huainan Normal University, Huainan, Anhui 232038, China.
The Journal of Chemical Physics
|January 22, 2026
Summary
Spin-crossover (SCO) complexes show promise for molecular spintronics. This study reveals a SCO Fe(II) complex exhibits significant spin-dependent transport, robust spin-filtering, and unique spin caloritronic properties under bias.
Area of Science:
- Materials Science
- Condensed Matter Physics
- Quantum Chemistry
Background:
- Spin-crossover (SCO) complexes offer switchable magnetic bistability between low-spin (LS) and high-spin (HS) states.
- SCO complexes are promising for molecular spintronics and spintronic devices.
Purpose of the Study:
- Investigate spin-dependent transport properties of a mononuclear SCO Fe(II) complex.
- Explore potential applications in molecular spintronics and spin caloritronics.
Main Methods:
- Density functional theory (DFT) calculations.
- Non-equilibrium Green's function (NEGF) technique.
- Simulated molecular junctions with gold electrodes under voltage and temperature bias.
Main Results:
- High-spin (HS) state current is significantly larger than low-spin (LS) state current (IHS/ILS ratio up to 30).
- Robust spin-filtering effect (nearly 100% spin-polarized current) observed in the HS state, independent of contact structure.
- Nearly perfect thermal spin filtration and negative differential thermal resistance observed in the HS state under temperature bias.
Conclusions:
- The studied SCO Fe(II) complex demonstrates excellent spin-dependent transport properties.
- Potential applications in molecular spintronics and spin caloritronics are highlighted.
- Theoretical findings support the use of SCO complexes in advanced electronic devices.
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