Layers That Conduct Heat Differently express

Original: "Stacking-Engineered Thermal Transport and Phonon Filtering in Rhenium Disulfide"

· Yongjian Zhou, Haoran Cui, Zefang Ye, Jung-Fu Lin, Yan Wang, Yaguo Wang

arXiv:2602.15002 · 2026-02-16 · CC BY 4.0 · 1 min

The stacking order of layers in a crystal changes how heat moves through it.

Heat dissipates poorly in thin layered materials, like a crowd in a narrow corridor. In ReS2 crystals, layers lie on top of each other, and heat can travel across them. Scientists measured how quickly this happens and found a surprise: when the layers are stacked directly one above the other, heat passes almost twice as fast as when they are shifted.

Heat is carried by atomic vibrations — phonons. In ReS2, they can travel up to 300 nanometers without collisions — thousands of times the thickness of a single layer.

The stacking order acts as a filter: with aligned layers, atomic vibrations last longer and carry more heat. It's like soldiers marching in step — less jostling, faster progress. When layers are shifted, the formation breaks, and heat dissipates.

Computer simulations showed that weak interlayer coupling only lets slow vibrations through, like a narrow door admitting only calm visitors. Strong coupling widens the passage.

Now engineers can manage heat in thin electronics simply by changing the stacking order of layers. It's like choosing how wide to make the corridor for heat.

Whole graph →

In ReS2, heat travels across the layers almost as if down a straight corridor — phonons fly hundreds of nanometers without collisions.

Scientists

Ludwig Boltzmann Rudolf Clausius Max Planck Albert Einstein

Concepts

molybdenum disulfide gallium arsenide tungsten diselenide microphone

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Layers That Conduct Heat Differently express