Alchemy, which attempted to turn cheap metals such as lead and copper into gold, has not yet succeeded. However, with the development of alloys in which two or three auxiliary elements are mixed with ...

Being the first element to form, hydrogen holds clues about the distribution of matter in our universe. Normally a gas, hydrogen exists as a solid under ultra-high-pressure conditions commonly found ...

Since the discovery of low-temperature superconductors, there has been an ongoing effort to realize superconductivity at room temperatures with low cooling costs. Crystalline materials containing ...

Fig. 1. (a) Planar LC structure of a general PBOE. (b) Chromatic aberration in a broadband PBL. (c) LC structure for a multi-twist PBOE. (d) Experimental result of a broadband PBL. Augmented reality ...