Title of article :
Silicon adatom chains and one-dimensionally confined electrons on 4H-SiC: The (2 × 1) reconstruction
Virojanadara، نويسنده , , C. and Hetzel، نويسنده , , M. and Riedl، نويسنده , , C. and Johansson، نويسنده , , L.I. and Choyke، نويسنده , , W.J. and Starke، نويسنده , , U.، نويسنده ,
Issue Information :
هفته نامه با شماره پیاپی سال 2008
The electronic and atomic structure of the 4H-SiC ( 1 1 ¯ 02 ) - ( 2 × 1 ) surface was investigated. Photoemission data indicate that the surface contains about 2 Si layers on top of the bulk layers. Scanning tunneling microscopy images show that these adlayers are terminated by an ordered array of adatom chains separated by the unit cell size. An electronic surface state located at a binding energy of 0.8 eV shows one-dimensional confinement with dispersion only along the chains. Based on the experimental observations, a tentative (2 × 1) surface model is derived with the surface terminated by alternating chains of Si adatoms and Si dimers in between.
Low energy electron diffraction (LEED) , Angle resolved photoemission , Scanning tunneling microscopy , etc.) , silicon carbide , Surface potential , Surface electronic phenomena (work function , Adatoms , Surface states , Surface relaxation and reconstruction , Single crystal surfaces
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