A hydrogen-induced structural phase transition on a W(100) surface was studied. The surface atoms on a clean W(100) were displaced along the <11> direction. Hydrogen adsorption tended to switch the displaced surface atoms along the <10> direction.

Adsorbate Induced Surface Reconstruction on W(100). K.Kankaala, T.Ala-Nissila, S.C.Ying: Physica Scripta, 1990, T33, 166-7