Antiphase domain boundaries (APDBs) in the (n x 1) (n = 4,5) reconstructions of the SrTiO3(110) surface were studied with scanning tunneling microscopy, x-ray photoemission spectroscopy, and density functional theory (DFT) calculations. Two types of APDBs form on each reconstruction; they consist of TixOy vacancy clusters with a specific stoichiometry. The presence of these clusters is controlled by the oxygen pressure during annealing. The structural models of the vacancy clusters are resolved with DFT, which also shows that their relative stability depends on the chemical potential of oxygen. The surface band bending can be tuned by controlling the vacancy clusters at the domain boundaries.
Wang ZM, Hao XF, Gerhold S, Schmid M, Franchini C, Diebold U (2014). Vacancy clusters at domain boundaries and band bending at the SrTiO3(110) surface. PHYSICAL REVIEW. B, CONDENSED MATTER AND MATERIALS PHYSICS, 90(3), 1-5 [10.1103/PhysRevB.90.035436].
Vacancy clusters at domain boundaries and band bending at the SrTiO3(110) surface
Franchini CMembro del Collaboration Group
;
2014
Abstract
Antiphase domain boundaries (APDBs) in the (n x 1) (n = 4,5) reconstructions of the SrTiO3(110) surface were studied with scanning tunneling microscopy, x-ray photoemission spectroscopy, and density functional theory (DFT) calculations. Two types of APDBs form on each reconstruction; they consist of TixOy vacancy clusters with a specific stoichiometry. The presence of these clusters is controlled by the oxygen pressure during annealing. The structural models of the vacancy clusters are resolved with DFT, which also shows that their relative stability depends on the chemical potential of oxygen. The surface band bending can be tuned by controlling the vacancy clusters at the domain boundaries.I documenti in IRIS sono protetti da copyright e tutti i diritti sono riservati, salvo diversa indicazione.
