Topmost surface analysis of SrTiO3 (001) by coaxial impact-collision ion scattering spectroscopy

Yoshimoto, Mamoru; Maeda, Tatsuro; Shimozono, K.; Koinuma, Hideomi; Shinohara, Makoto; Ishiyama, Osamu; Ohtani, F.

doi:10.1063/1.112988

Cited by 109 publications

(33 citation statements)

References 16 publications

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“…16 In this case, the weakest bond links precisely the BaO plane to the CuO plane. To correlate a measured property with a specific stack requires two important steps: ͑i͒ to prepare a substrate with a unique and known TL contrary to the observed mixture [17][18][19][20] and ͑ii͒ to identify the TL of the dominant stack on the film surface. Critical to both steps is a direct procedure to check on a local scale the presence, distribution, and nature of the different TL.…”

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confidence: 99%

Local determination of the stacking sequence of layered materials

Fompeyrine

Berger

Lang

et al. 1998

Applied Physics Letters

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The ability to modify the stacking sequence of ultrathin films offers a unique way to change either the interaction strength or the doping, but demands a careful control of each atomic monolayer. Progress is hampered by the lack of a direct method that allows differentiation on a local scale between the various terminating layers of a crystal. Here, the combination of a vacuum annealing process and friction force microscopy reveals this local distinction on a SrTiO3 surface. Using the friction contrast, we find how the terminating layer of a single crystal profoundly influences the terrace edge structure.

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confidence: 99%

Local determination of the stacking sequence of layered materials

Fompeyrine

Berger

Lang

et al. 1998

Applied Physics Letters

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“…A large number of studies have been performed in recent years to understand and to determine a variety of SrTiO 3 surface structures realized under different experimental conditions. [3][4][5][6][7][8][9][10][11][12][13][14][15][16][17][18][19][20][21] Some of the reported experimental observations are summarized in Table I.…”

Section: Introductionmentioning

confidence: 99%

Electronic structure and thermodynamic stability of double-layeredSrTiO3(001)surfaces:Ab initiosimulations

et al. 2007

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Using the B3PW hybrid exchange-correlation functional within density-functional theory and employing Gaussian-type basis sets, we calculated the atomic and electronic structures and thermodynamic stability of three double-layered ͑DL͒ SrTiO 3 ͑001͒ surfaces: ͑i͒ SrO-terminated, ͑ii͒ TiO 2 -terminated, and ͑iii͒ ͑2 ϫ 1͒ reconstruction of TiO 2 -terminated SrTiO 3 ͑001͒ recently suggested by Erdman et al. ͓Nature ͑London͒ 419, 55 ͑2002͔͒. A thermodynamic stability diagram obtained from first-principles calculations shows that regular TiO 2 -and SrO-terminated surfaces are the most stable. The stability regions of ͑2 ϫ 1͒ DL TiO 2 -and DL SrO-terminated surfaces lie beyond the precipitation lines of SrO and TiO 2 compounds and thus are less stable with respect to regular SrTiO 3 ͑001͒ surfaces. Analysis of the stability diagram suggests that Sr precipitation on SrTiO 3 surface never occurs. Our simulations show a substantial increase of Ti-O covalency on the DL surfaces as compared to the regular surfaces, which are themselves more covalent than the crystalline bulk. The implications of our calculated results for recent experimental observations are discussed.

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“…The oxygen vacancy concentration is neither high enough to produce conductivity nor to produce a surface reconstruction. It is worth mentioning that shell model calculation [15] and STM [11][12][13][14] works have shown that the (100) SrTiO 3 surface is Ti-Oterminated. The same pattern was detected up to 740°C (see Fig.…”

Section: Leed Resultsmentioning

confidence: 99%