An exciton is a bound state of an electron and a hole, held together by the Coulomb force within a semiconductor, insulator, or other material. It represents a fundamental solid-state excitation. When ...

Two-dimensional materials are substances with a thickness of a few nanometres or less. Electrons in these materials are free to move in the two-dimensional plane, but their restricted motion in the ...

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Here’s what you’ll learn when you read this story: A 2021 paper proposed that fermionic dark matter could inhabit a warped fifth dimension. The model uses a new scalar field as a portal between the ...