Their analyses demonstrate that the hexagonal symmetry characteristic of grid-cell activation patterns (and of more familiar structures such as the honeycomb) affords the highest possible spatial ...

This leads to a different unit cell: the Hexagonal Unit Cell, and this type of packing is referred to as hexagonal closest packing (hcp). Although it may be difficult to see, demonstrate to yourself ...

In a paper recently published in Chinese Physics Letters, a research team from Peking University report their latest discovery in the field of high-temperature superconductivity, revealing the ...