Heterodimensional superlattice with in-plane anomalous Hall effect.

Area of Science:

• Materials Science
• Condensed Matter Physics
• Nanotechnology

Background:

• Superlattices enable tailored material properties through periodic stacking of distinct layers.
• Heterodimensional superlattices, combining different dimensionalities, offer unique structural and electronic possibilities.

Purpose of the Study:

• To synthesize and characterize a novel intrinsic heterodimensional superlattice composed of 2D vanadium disulfide and 1D vanadium sulfide chains.
• To investigate the electronic and magnetic properties of this unique superlattice structure.

Main Methods:

• Chemical vapor deposition for synthesizing the superlattice.
• Scanning transmission electron microscopy for structural characterization.
• Hall effect measurements and theoretical calculations for property analysis.

Main Results:

• Successful synthesis of a VS2/VS heterodimensional superlattice with unconventional 1T monoclinic stacking.
• Observation of a persistent in-plane Hall effect up to 380 K, even under in-plane magnetic fields.
• Theoretical validation attributing the effect to an unconventional anomalous Hall effect driven by the 1D VS chains.

Conclusions:

• The study reports a new class of intrinsic heterodimensional superlattices with unique structural features.
• The observed in-plane Hall effect challenges conventional understanding and highlights the role of dimensionality and Berry curvature.
• This work opens avenues for designing advanced superstructures with exotic electronic properties.