Semiconductors: GaAs meets its match

Pennicott, Katie

doi:10.1088/2058-7058/14/10/5

Cited by 7 publications

(5 citation statements)

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“…Its lattice structure forms high-quality interfaces with other materials, including high-temperature superconducting thin films. 4,5 For such reasons, recent interest in SrTiO 3 has been dominated by surface and interface studies for applications ranging from micro-/nano-electronics [6][7][8][9][10] and telecommunications [11][12][13] to photonics 14,15 and photocatalysis. 16,17 Surface treatment of SrTiO 3 gives rise to surfaces that can become highly conductive, 18 blue-light emitting, 19 or even nanostructured.…”

Section: Introduction Interest In Strontium Titanatementioning

confidence: 99%

Strontium titanate surfaces

Deak¹

2007

Materials Science and Technology

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Strontium titanate (SrTiO 3 ) is a perovskite material with a variety of useful yet complex surface structures. Recent studies of SrTiO 3 have revealed how surface treatment can give rise to multi-functional surfaces, with attributes ranging from blue-light emission and high electrical conductivity to photocatalytic activity and nanostructure self-assembly. Research encompassing the surface science of strontium titanate is reviewed which includes studies that utilise scanning tunnelling microscopy, atomic force microscopy, electron diffraction, surface spectroscopy and theoretical modelling techniques are critically reviewed. A series of investigations that characterise the structural and chemical environment of SrTiO 3 surfaces are outlined and discussed. Various issues regarding SrTiO 3 surfaces are examined, including near-surface chemistry, surface terminations and surface structure. Emphasis is put on the link between surface processing methods and properties. A rich variety of surface reconstructions and structures have been observed but few are well characterised. Future advances in understanding these surfaces will be accompanied by studies that apply these surfaces for engineering new systems on the nanoscale.

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Section: Introduction Interest In Strontium Titanatementioning

confidence: 99%

Strontium titanate surfaces

Deak¹

2007

Materials Science and Technology

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“…Strontium titanate, SrTiO 3 (STO), is one of the perovskite-type oxide compounds which is of great technological and scientific interest. It is used as a substrate for the growth of high-T c (critical temperature) superconductors [1][2][3], as high-temperature oxygen sensors [4,5] and as a buffer material for the growth of GaAs on Si [6].…”

Section: Introductionmentioning

confidence: 99%

“…Metallic films on oxide substrates are relevant to crystal growth, catalysis, gas sensor operation, etc [1][2][3][4][5][6][7]. When metals are deposited on metal oxide surfaces, interesting surface chemistry can take place.…”

Section: Introductionmentioning

confidence: 99%

Lithium adsorption on the SrTiO₃(100) surface

Mori¹,

Kamaratos²

2007

J. Phys.: Condens. Matter

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In this paper we study the kinetics of Li adsorption on the SrTiO3(100) (STO(100)) surface at room temperature (RT). The study took place in an ultra-high vacuum (UHV) by low-energy electron diffraction (LEED), Auger electron spectroscopy (AES), electron energy-loss spectroscopy (EELS), temperature-programmed desorption (TPD) and work function (WF) measurements. At low Li coverage (θ<0.5 ML), Li adsorbs as isolated atoms, whereas at higher coverage it intermixes with the oxygen of the substrate and/or it intercalates into the substrate. The sticking coefficient of Li on STO(100) is constant. The lithium remains in a non-metallic state on the surface. After heating at 1100 K, part of the Li remains on the surface.

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“…The main interest in SrTiO 3 surfaces has emerged from its extensive use as a substrate for the growth of high T c superconducting thin films. More recently it has also been investigated as a candidate for a crystalline gate dielectric in siliconbased devices [1,2], and a buffer material for the growth of GaAs on Si [3]. But in spite of the technological and scientific importance of SrTiO 3 , the atomic structure of the crystal surfaces and their reconstructions are only poorly understood.…”

Section: Introductionmentioning

confidence: 99%

Scanning tunneling microscopy of reconstructions on the SrTiO3() surface

2002

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Scanning tunneling microscopy (STM) was used to investigate the (0 0 1) surface atomic structure of Nb-doped SrTiO 3 single crystals which were annealed in ultra high vacuum. Atomic resolution images of the (2 Â 1), c(4 Â 4), and c(4 Â 2) reconstructions are presented. Surface structure models are proposed based on qualitative interpretation of the STM images. Surface terminations with different Ti to O ratios are considered. Ó

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Semiconductors: GaAs meets its match

Cited by 7 publications

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Strontium titanate surfaces

Strontium titanate surfaces

Lithium adsorption on the SrTiO₃(100) surface

Scanning tunneling microscopy of reconstructions on the SrTiO3() surface

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Semiconductors: GaAs meets its match

Cited by 7 publications

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Strontium titanate surfaces

Strontium titanate surfaces

Lithium adsorption on the SrTiO3(100) surface

Scanning tunneling microscopy of reconstructions on the SrTiO3() surface

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Lithium adsorption on the SrTiO₃(100) surface