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Perceptual and Category Processing of the Uncanny Valley Hypothesis' Dimension of Human Likeness: Some Methodological Issues

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Valley Acoustoelectric Effect.

A V Kalameitsev¹, V M Kovalev^1,2, I G Savenko^1,3

¹Rzhanov Institute of Semiconductor Physics SB RAS, 630090 Novosibirsk, Russia.

Physical Review Letters

|July 27, 2019

Summary

This summary is machine-generated.

Researchers discovered a new valley acoustoelectric effect in 2D materials. This effect generates electric and spin currents using surface acoustic waves, enabling new valleytronic devices.

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Area of Science:

Condensed Matter Physics
Materials Science
Quantum Mechanics

Background:

Valleytronics utilizes electron properties in 2D materials.
Acoustoelectric effects involve interactions between sound and charge carriers.
Transition metal dichalcogenide monolayers on piezoelectric substrates are key systems.

Purpose of the Study:

To report the novel valley acoustoelectric effect.
To theoretically describe the emergence of drag electric and spin currents.
To propose methods for independent measurement of current components.

Main Methods:

Theoretical modeling of electron dynamics in 2D materials under acoustic waves.
Analysis of contributions to the acoustoelectric current (valley-independent, trigonal warping, Berry phase).
Development of an angular pattern to characterize topological properties.

Main Results:

Demonstrated a new valley acoustoelectric effect in 2D materials on piezoelectric substrates.
Identified three distinct contributions to the acoustoelectric current.
Showcased the generation of currents orthogonal to the acoustic wave vector.
Established methods for independent measurement of diffusive, warping, and acoustoelectric valley Hall currents.

Conclusions:

The valley acoustoelectric effect offers a new pathway for valley manipulation.
Acoustic methods can control valley transport, expanding valleytronics.
This research paves the way for novel acoustoelectric valleytronic devices.