Fermi surface nesting and structural transition on a metal surface: In /Cu(001).
Peierls-type instability and structural phase transition are shown to occur on the surface of a normal metal. An In overlayer on Cu(001) undergoes a reversible transition at approximately 350 K. Scanning tunneling microscopy of the low-temperature, reduced-symmetry phase indicates a strong periodic lattice distortion (PLD). Angle-resolved photoemission of the high-temperature phase reveals that the In-derived surface resonance constitutes a square-shaped, quasi-two-dimensional Fermi surface within the projected bulk Cu bands. The Fermi surface exhibits one-dimensional nesting upon the transition, which is in agreement with the PLD periodicity.
Nakagawa
T
T
Department of Chemistry, Graduate School of Science, Kyoto University, Japan.
Boishin
G I
GI
Fujioka
H
H
Yeom
H W
HW
Matsuda
I
I
Takagi
N
N
Nishijima
M
M
Aruga
T
T