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Updated: Dec 21, 2025

Atomic Layer Deposition of Vanadium Dioxide and a Temperature-dependent Optical Model
Published on: May 23, 2018
Size effect on excess resistivity induced by hydrogen in ultra-thin vanadium systems
Wen Huang1, Martin Brischetto2, Parker Steichen2
1State Key Laboratory of Silicon Materials and School of Materials Science and Engineering, Zhejiang University, Hangzhou 310027, People's Republic of China. wenhuang862017@163.com and Department of Physics and Astronomy, Uppsala University, Box 516, SE-751 20, Uppsala, Sweden.
A significant vanadium size effect impacts excess resistivity changes during hydrogenation in Fen/V7n superlattices. This highlights the crucial roles of interfaces and hydrogen interactions in their electrical properties.
Area of Science:
- Materials Science
- Condensed Matter Physics
- Solid State Chemistry
Background:
- Superlattices offer tunable properties based on layer composition and thickness.
- Hydrogenation significantly alters the electrical and magnetic characteristics of many materials.
Purpose of the Study:
- To investigate the influence of vanadium layer thickness on excess resistivity changes during hydrogenation in Fe/V superlattices.
- To elucidate the role of interfaces and hydrogen-hydrogen interactions in the observed phenomena.
Main Methods:
- Fabrication of Fen/V7n (n = 2, 4) superlattices.
- Measurement of excess resistivity changes during hydrogenation using a four-point probe technique.
- Utilizing an optical technique to complement resistivity measurements.
Main Results:
- A distinct vanadium size effect was observed on excess resistivity during hydrogenation at concentrations c ≥ 0.05 H/V.
- The magnitude of resistivity change was found to be dependent on the vanadium layer thickness.
- Evidence suggests significant contributions from interface effects and hydrogen-hydrogen interactions.
Conclusions:
- Vanadium layer thickness profoundly influences the electrical response to hydrogenation in Fe/V superlattices.
- Interfacial effects and hydrogen-hydrogen interactions are key factors governing hydrogen's impact on electrical properties in these systems.
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