Angle-resolved photoemission study of hydrogen adsorbed on Fe(110)

• Published in: Surface science Vol. 253; no. 1; pp. 147 - 156
• Main Authors: Maruyama, T., Sakisaka, Y., Kato, H., Aiura, Y., Yanashima, H.
• Format: Journal Article
• Language: English
• Published: Lausanne Elsevier B.V 01.08.1991; Amsterdam Elsevier Science; New York, NY
• Subjects: Applied sciences; Chemistry; Exact sciences and technology; General and physical chemistry; Metals. Metallurgy; Solid-gas interface; Surface physical chemistry; Inorganic adsorbate; Angular resolution; Hydrogen; Brillouin zone; Crystal face; Iron; Transition metal; Experimental study; Single crystal; Surface structure; Gas solid adsorption; Ultraviolet radiation; Gas solid interface; Metallic adsorbent; Photoelectron spectrometry; Physical method
• ISSN: 0039-6028; 1879-2758
• DOI: 10.1016/0039-6028(91)90588-J

Two-dimensional dispersion of the H 1s-derived energy bands of the Fe(110)-(2 × 1)H and -(3 × 1)H surfaces was studied by angle-resolved photoemission spectroscopy with synchrotron radiation. An H 1s-derived state, split off from the Fe bulk bands, is found at 7.9 eV (8.2 eV) below the Fermi energy at \ ̄ gG for the (2 × 1)H phase (for the (3 × 1)H phase). For the (2 × 1)H phase (for the (3 × 1)H phase), this H split-off state disperses upward by ~ 1.5 eV ( ~ 0.9 eV) with k ∥ in the [11̄0] azimuth and by ~ 1.0 eV ( ~ 1.6 eV) in the [001] azimuth. For both phases, the effective mass ( m ∗ m ) near \ ̄ gG is found to be ~ 1.7 in the [11̄0] azimuth whereas i considerably small ( ~ 0.4) in the [001] azimuth, being consistent with the anisotropy of the overlayer structures. An avoided band crossing of the H 1s-derived band and the Fe 4s band is observed.