Weyl semimetal

Imagine you are playing with some toy cars that can only move forwards and backwards on a straight track. Now imagine that the cars are electrons - tiny particles inside materials that can carry charge and make electricity flow.

In a regular material like metal or plastic, the electrons can move freely forwards and backwards through the material. But in a special type of material called a Weyl semimetal, the electrons are forced to move in a certain direction thanks to something called "chirality."

Chirality is like having a right or left-handedness - just like how you might prefer to use your right or left hand for different tasks. In a Weyl semimetal, the electrons are only allowed to move in one direction determined by their chirality. It's like having a one-way street for cars - they can only travel in one direction on that road.

This specific directionality helps scientists study and understand the properties of the electrons in a Weyl semimetal. By experimenting with these materials, scientists can learn more about how electrons behave in different situations, which can lead to new technologies and applications.