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International audienceStructural  investigations  of  the  (2-10)  and  (100)  surfaces  of  Al5Co2 using  experimental  ultrahigh  vacuum techniques and ab initio computational methods are presented in this work. Both surfaces are identified and show bulk terminations where only specific atoms remain. These atoms can be seen as truncated parts of chemically bonded atomic motifs which have been identified in the bulk in a previous work [M. Meier et al., Phys. Rev. B 91,085414 (2015)]. Whereas the (2-10) surface presents a single termination, the structure of the (100) topmost layers is found to be highly dependent on the preparation conditions, especially on the annealing temperature. This behavior, also observed for the (001) surface studied previously, can be partly explained when considering the bonding strength of the truncated motif parts with the subsurfac

physical review. b./physical review. b

Structural investigations of<mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML"><mml:mrow><mml:msub><mml:mi>Al</mml:mi><mml:mn>5</mml:mn></mml:msub><mml:msub><mml:mi>Co</mml:mi><mml:mn>2</mml:mn></mml:msub><mml:mrow><mml:mo>(</mml:mo><mml:mn>2</mml:mn><mml:mover><mml:mn>1</mml:mn><mml:mo>¯</mml:mo></mml:mover><mml:mn>0</mml:mn><mml:mo>)</mml:mo></mml:mrow></mml:mrow></mml:math>and (100) surfaces: Influence of bonding strength and annealing temperature on surface terminations

Structural investigations ofAl5Co2(21¯0)and (100) surfaces: Influence of bonding strength and annealing temperature on surface terminations