TY - JOUR
T1 - Disappearance of the quasi-one-dimensional plasmon at the metal-insulator phase transition of indium atomic wires
AU - Liu, Canhua
AU - Inaoka, Takeshi
AU - Yaginuma, Shin
AU - Nakayama, Tomonobu
AU - Aono, Masakazu
AU - Nagao, Tadaaki
PY - 2008/5/12
Y1 - 2008/5/12
N2 - An array of indium atomic wires on Si(111) exhibits a temperature-induced phase transition between (4×1) and (8×2) structures, both of which were investigated by using electron energy loss spectroscopy (EELS). The EELS spectra of the (4×1) phase taken at room temperature show a clear momentum-dependent energy loss peak, which is assigned to the one-dimensional (1D) plasmon originating from 1D metallic electronic state of the In atomic wires. In the (8×2) structure at 80 K, in contrast, the plasmon peak completely disappears. This result is explained by the wide gap opening of the 1D electronic band at the Fermi energy at the metal-insulator transition between the (4×1) and (8×2) structures.
AB - An array of indium atomic wires on Si(111) exhibits a temperature-induced phase transition between (4×1) and (8×2) structures, both of which were investigated by using electron energy loss spectroscopy (EELS). The EELS spectra of the (4×1) phase taken at room temperature show a clear momentum-dependent energy loss peak, which is assigned to the one-dimensional (1D) plasmon originating from 1D metallic electronic state of the In atomic wires. In the (8×2) structure at 80 K, in contrast, the plasmon peak completely disappears. This result is explained by the wide gap opening of the 1D electronic band at the Fermi energy at the metal-insulator transition between the (4×1) and (8×2) structures.
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U2 - 10.1103/PhysRevB.77.205415
DO - 10.1103/PhysRevB.77.205415
M3 - Article
AN - SCOPUS:43549117693
VL - 77
JO - Physical Review B - Condensed Matter and Materials Physics
JF - Physical Review B - Condensed Matter and Materials Physics
SN - 0163-1829
IS - 20
M1 - 205415
ER -