Abstract
It is found that the magnetoresistance of the Mo(110) plate non-monotonically depends on hydrogen coverage and degree of the ordering of adsorbed hydrogen layers. In particular, there is a pronounced minimum on the dependence corresponding to formation of well-ordered (2 × 2)-2H structure. The magnetoresistance measured for the (1 × 1)H structure is noticeably less than that for a clean Mo(110) surface. On the ground of DFT calculations of the electronic structures and Fermi surfaces for a clean Mo(110) surface and the surface with adsorbed (2 × 2)-2H and (1 × 1)H hydrogen layers, we attribute this effect, in line with the diffraction theory of scattering of conduction electrons [A.F. Andreev, Sov. Phys. Uspekhy 14 (1972) 609], to an increase of the specularity of the scattering caused by the ordering of the surface structures.
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