Surface structure of SrTiO3(1 0 0)

Kubo, Toshitaka; Nozoye, Hisakazu

doi:10.1016/s0039-6028(03)00998-1

Cited by 142 publications

(140 citation statements)

References 46 publications

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“…Kawasaki et al [24] and later-on Koster et al [25] used a combination of chemical etching and oxygen post annealing to realize perfectly single-terminated STO (001) substrates [ Fig.2c]. Later studies demonstrated that these single crystals were TiO 2 -terminated and structurally unreconstructed [26]; this is at odds with several previous surface studies on ultra high vacuum (UHV) prepared STO single crystals, which exhibited a wide range of reconstructions, like 2x1, 2x2, c2x2 and √5x √5-R26.6° [27], depending essentially on the annealing temperatures in UHV…”

Section: General Properties Of Laalo 3 and Srtiomentioning

confidence: 98%

Electronic Reconstruction at the Interface Between Band Insulating Oxides: The LaAlO3/SrTiO3 System

Salluzzo

2015

Oxide Thin Films, Multilayers, and Nanocomposites

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The conducting quasi-two dimensional electron system (q2DES) formed at the interface between LaAlO 3 and SrTiO 3 band insulators is confronting the condensed matter physics community with new paradigms. While the mechanism for the formation of the q2DES is debated, new conducting interfaces have been discovered paving the way to possible applications in electronics, spintronics and optoelectronics. This chapter is an overview of the research on the LAO/STO system, presenting some of the most important results obtained in the last decade to clarify the mechanism of formation of the q2DES at the oxide interfaces and its peculiar electronic properties as compared to semiconducting 2D-electron gas.

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Section: General Properties Of Laalo 3 and Srtiomentioning

confidence: 98%

Electronic Reconstruction at the Interface Between Band Insulating Oxides: The LaAlO3/SrTiO3 System

Salluzzo

2015

Oxide Thin Films, Multilayers, and Nanocomposites

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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%

“…Liborio et al 35 investigated the Sr-adatom model recently proposed by Kubo and Nozoye. 7 This model consists of ordered Sr adatoms at the oxygen fourfold sites of a TiO 2 -terminated layer. Kubo and Nozoye applied the Sr-adatom model to explain almost all observed reconstructions of SrTiO 3 ͑001͒.…”

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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“…Several techniques have been developed both from the theoretical and experimental fronts to address this issue. For conducting materials and simple unit cells, low-energy electron diffraction (LEED) is a very powerful approach [1][2][3][4][5][6], particularly when complemented by atomic resolution scanning probe methods [4,[7][8][9][10][11][12][13][14][15][16][17][18][19][20][21][22][23]. Transmission electron diffraction (TED) [24,25] in unison with direct methods [26][27][28][29], X-ray scattering studies [29][30][31], reflection high energy electron diffraction (RHEED) [20,32,33] and recently high resolution secondary electron microscopy (HRSEM) [34] have also been effectively used to study surface structures.…”

Section: Introductionmentioning

confidence: 99%

“…This is particularly relevant for oxide materials which have an abundance of surface reconstructions; even the prototypical perovskite material SrTiO 3 has highly complex surface structures [1,2,4,6,9,[12][13][14]16,17,19,[21][22][23][24][25]27,29,[34][35][36][37]. The surfaces of these oxides are of prime importance as many phenomena occur at the surface.…”

Section: Introductionmentioning

confidence: 99%

When does atomic resolution plan view imaging of surfaces work?

et al. 2016

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a b s t r a c tSurface structures that are different from the corresponding bulk, reconstructions, are exceedingly difficult to characterize with most experimental methods. Scanning tunneling microscopy, the workhorse for imaging complex surface structures of metals and semiconductors, is not as effective for oxides and other insulating materials. This paper details the use of transmission electron microscopy plan view imaging in conjunction with image processing for solving complex surface structures. We address the issue of extracting the surface structure from a weak signal with a large bulk contribution. This method requires the sample to be thin enough for kinematical assumptions to be valid. The analysis was performed on two sets of data, c(6 Â 2) on the (100) surface and (3 Â 3) on the (111) surface of SrTiO 3 , and was unsuccessful in the latter due to the thickness of the sample and a lack of inversion symmetry. The limits and the functionality of this method are discussed.

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Surface structure of SrTiO3(1 0 0)

Cited by 142 publications

References 46 publications

Electronic Reconstruction at the Interface Between Band Insulating Oxides: The LaAlO3/SrTiO3 System

Electronic Reconstruction at the Interface Between Band Insulating Oxides: The LaAlO3/SrTiO3 System

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

When does atomic resolution plan view imaging of surfaces work?

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