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Kubo, Toshitaka; Nozoye, Hisakazu

doi:10.1103/physrevlett.86.1801

Cited by 115 publications

(72 citation statements)

References 24 publications

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“…To further explore unique functionalities at these surfaces and interfaces, an understanding of the electronic states of these two surface terminations at atomic resolution is highly desirable. In the TiO 2 -terminated surface, numerous surface reconstructions that are dependent on the surface preparation conditions have been reported in single crystals [5,6] and thin films [7,8], whereas the SrO-terminated surface has remained relatively unexplored [9].…”

Section: Introductionmentioning

confidence: 99%

Stripe charge ordering in SrO-terminated SrTiO3(001) surfaces

et al. 2011

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The local electronic structure of the SrO-terminated SrTiO3(001) surface was explored using scanning tunneling microscopy. At low bias voltages in the empty states, a unidirectional structure with a periodicity of 3 unit cells, superimposed on a c(2 × 2) reconstructed structure, was found to develop along the crystallographic a axis. This structure indicates a charge-ordered stripe induced by carrier doping from oxygen vacancies in the SrO and the subsurface TiO2 planes. In the filled states, localized deep in-gap states were observed in addition to large energy gaps in the tunneling spectra. This result represents inelastic tunneling due to significant electron-lattice interaction associated with unidirectional lattice distortion in the SrO-terminated surface.

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Section: Introductionmentioning

confidence: 99%

Stripe charge ordering in SrO-terminated SrTiO3(001) surfaces

et al. 2011

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“…1͒ is a powerful technique for atomically resolved imaging of a wide variety of insulating, [2][3][4][5] semi-insulating, [6][7][8][9][10][11] and van der Waals surfaces, 12 as well as for the highest resolution imaging of molecular species on surfaces. [13][14][15] However, details of the mechanism of contrast formation and chemical identities of observed image features often remain unresolved.…”

Section: Introductionmentioning

confidence: 99%

Role of tip structure and surface relaxation in atomic resolution dynamic force microscopy:CaF2(111)as a reference surface

et al. 2002

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Reichling, Michael. 2002. Role of tip structure and surface relaxation in atomic resolution dynamic force microscopy: CaF2 (111) All material supplied via Aaltodoc is protected by copyright and other intellectual property rights, and duplication or sale of all or part of any of the repository collections is not permitted, except that material may be duplicated by you for your research use or educational purposes in electronic or print form. You must obtain permission for any other use. Electronic or print copies may not be offered, whether for sale or otherwise to anyone who is not an authorised user.Powered by TCPDF (www.tcpdf.org)Role of tip structure and surface relaxation in atomic resolution dynamic force microscopy: CaF 2 "111… as a reference surface By combining experimental dynamic scanning force microscope ͑SFM͒ images of the CaF 2 (111) surface with an extensive theoretical modeling, we demonstrate that the two different contrast patterns obtained reproducibly on this surface can be clearly explained in terms of the change of the sign of the electrostatic potential at the tip end. We also present direct theoretical simulations of experimental dynamic SFM images of an ionic surface at different tip-surface distances. Experimental results demonstrate a qualitative transformation of the image pattern, which is fully reproduced by the theoretical modeling and is related to the character of tip-induced displacements of the surface atoms. The modeling of the image transformation upon a systematic reduction of the tip-surface distance with ionic tips allows an estimate of the tip-surface distance present in experiment, where 0.28 -0.40 nm is found to be optimal for stable imaging with well-defined atomic contrast. We also compare the modeling with ionic tips to results for a pure silicon tip. This comparison demonstrates that a silicon tip can yield only one type of image contrast and that the tip-surface interaction is not strong enough to explain the image contrast observed experimentally. The proposed interpretation of two types of images for the CaF 2 (111) surface can also be used to determine the chemical identity of imaged features on other surfaces with similar structure.

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“…A bewildering large number of different reconstructions have been experimentally observed on the SrTiO 3 surface including a series of (n×n) reconstructions on the (111) surface [1], (n×1) and (1×n) reconstructions on the (110) surface [2] and an even larger number for the (001), namely, the (1×1) [3][4][5][6][7][8][9][10], (2×1) [4,8,9,[11][12][13], (2×2) [8][9][10][14][15][16], c(4×2) [11,14,17,18], c(4×4) [4,8,16], (4×4) [16], c(6×2) [11,12,[17][18][19], (6×2) [18], (√5×√5)R26.6º [16,[20][21][22][23], (√13×√13)R33.7º [12,16] (RT13 hereafter) plus many more [24] which may only be locally stable such as a (4√2×√2)R45º.…”

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confidence: 99%