Journal Article Research Support, Non-U.S. Gov't all-solid-state batteries angle-resolved photoemission anisotropic wetting charge density waves grain boundary free hole carriers in Cu inorganic solid electrolytes molecular beam epitaxy nonlinear Hall effect oil sliding surfaces overhang structures rice leaf single‐crystal copper thin film solution syntheses sulfides tantalum ditellurides transition metal dichalcogenides triangular hole orbit wet-chemical methods