{ital p}({ital n}{times}1) superstructures of Pb on Cu(110)
- Institut fuer Allgemeine Physik, Technische Universitaet Wien, A-1040 Wien (Austria)
- Department of Physics, University of Illinois at Urbana-Champaign, Urbana, Illinois 61801 (United States)
The structures of the {ital p}({ital n}{times}1) superstructures ({ital n}=4, 5, and 9) of Pb on Cu(110) in the coverage range between {ital FTHETA}=0.75 and 0.8 are revealed by atomically resolved scanning tunneling microscopy. All three superstructures are formed by substitution of every {ital n}th row of Cu atoms ({ital n}=4, 5, and 9) in the [001] direction by Pb atoms. The Pb atoms in between are lined up in the [{bar 1}10] direction. The {ital p}(4{times}1) structure appears in two different modifications: one with substitutional rows of Pb atoms and one with a simple overlayer structure without substituted rows of Cu atoms. Alternating succession of these two modifications results in {ital p}(12{times}1) domains. It is further shown that the {ital p}(9{times}1) structure is not a succession of {ital p}(4{times}1) and {ital p}(5{times}1) but a superstructure on its own. The {ital p}(5{times}1) structure proposed here agrees with previous x-ray-diffraction data at least as well as the quasihexagonal model proposed earlier. We have, in addition, identified the nature of the phase that has been described incommensurate obtained by desorption of Pb upon annealing above 600 K.
- Research Organization:
- University of Illinois
- DOE Contract Number:
- FG02-91ER45439
- OSTI ID:
- 147798
- Journal Information:
- Physical Review, B: Condensed Matter, Journal Name: Physical Review, B: Condensed Matter Journal Issue: 23 Vol. 52; ISSN 0163-1829; ISSN PRBMDO
- Country of Publication:
- United States
- Language:
- English
Similar Records
Substitution-induced superstructures in Cu(1)-doped YBa/sub 2/(Cu/sub 1/minus//ital x/M/subx//)/sub 3/O/sub 7/ ceramic (/ital M/=trivalent cation)
Structural, magnetic, and transport properties of La{sub 2}Cu{sub 1{minus}{ital x}}Li{sub {ital x}}O{sub 4}