TY - JOUR
KW - density functional calculations
KW - X-ray scattering
KW - diffraction
KW - surface structure
KW - gallium arsenide
KW - paper
AU - D Paget
AU - Olivia Pulci
AU - M Sauvage
AU - Y Garreau
AU - Lucia Reining
AU - P Chiaradia
AU - F. Bechstedt
AU - R Pinchaux
AB - While the As-rich 2 x 4 reconstruction of GaAs(001) is well explained by the so-called beta(2) structure, the atomic structure of the Ga-rich 4 x 2 phase has been discussed for a long time. In this review, the most important structural models for the GaAs(001) (4 x 2)/c(8 x 2) surface are compared from different theoretical and experimental points of view. The selected reconstructions include the recently proposed model, a new mixed dimer model, and the well-known beta, beta(2), Cerda and Skala zeta models. The different structures are compared on the basis of total energy calculations, simulations of STM experimental images and interpretation of X-ray diffraction data. Only the zeta model satisfies all criteria, and provides therefore a satisfactory explanation of the atomic structure of GaAs(001)-(4 x 2).
BT - Surface Review and Letters
CY - JOURNAL DEPT PO BOX 128 FARRER ROAD, SINGAPORE 912805, SINGAPORE
DA - JUN-AUG
M1 - 3-4
N2 - While the As-rich 2 x 4 reconstruction of GaAs(001) is well explained by the so-called beta(2) structure, the atomic structure of the Ga-rich 4 x 2 phase has been discussed for a long time. In this review, the most important structural models for the GaAs(001) (4 x 2)/c(8 x 2) surface are compared from different theoretical and experimental points of view. The selected reconstructions include the recently proposed model, a new mixed dimer model, and the well-known beta, beta(2), Cerda and Skala zeta models. The different structures are compared on the basis of total energy calculations, simulations of STM experimental images and interpretation of X-ray diffraction data. Only the zeta model satisfies all criteria, and provides therefore a satisfactory explanation of the atomic structure of GaAs(001)-(4 x 2).
PB - WORLD SCIENTIFIC PUBL CO PTE LTD
PP - JOURNAL DEPT PO BOX 128 FARRER ROAD, SINGAPORE 912805, SINGAPORE
PY - 2002
SP - 1497
EP - 1510
T2 - Surface Review and Letters
TI - Do we understand the structure of the gallium-rich surface of GaAs(001)? Experimental and theoretical approaches
VL - 9
ER -