In 1934 physicist Eugene Wigner posited the existence of a crystal consisting entirely of electrons
In 1934 physicist Eugene Wigner posited the existence of a crystal consisting entirely of electrons in a honeycomb-like structure. The so-called Wigner crystal remained largely conjecture, however, until Feng Wang and colleagues announced in 2021 that they had captured an image of one. The researchers trapped electrons between two semiconductors and then cooled the apparatus, causing the electrons to settle into a crystalline structure. By inserting an ultrathin sheet of graphene above the crystal, the researchers obtained an impression—the first visual confirmation of the Wigner crystal. Which choice best states the main idea of the text?
- A) Researchers have obtained the most definitive evidence to date of the existence of the Wigner crystal.
- B) Researchers have identified an innovative new method for working with unusual crystalline structures.
- C) Graphene is the most important of the components required to capture an image of a Wigner crystal.
- D) It
Correct Answer: A) Researchers have obtained the most definitive evidence to date of the existence of the Wigner crystal.
Explanation
The choice that best states the main idea of the text is A) Researchers have obtained the most definitive evidence to date of the existence of the Wigner crystal. The text discusses how physicist Eugene Wigner proposed the existence of a crystal consisting entirely of electrons in 1934, but it remained largely conjecture until 2021. The main idea is that researchers, specifically Feng Wang and colleagues, announced in 2021 that they had captured an image of a Wigner crystal, providing the most definitive evidence of its existence. Therefore, the main focus of the text is on the breakthrough achieved by the researchers regarding the Wigner crystal.