Reflection anisotropy spectroscopy of the oxidized diamond (001) surface

Schwitters, M.; Martin, D. S.; Unsworth, P.; Farrell, T.; Butler, James E.; Weightman, P.

doi:10.1088/0953-8984/21/36/364218

Cited by 3 publications

(3 citation statements)

References 20 publications

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“…Just ideal (flat, no defects, no steps) geometries will be considered here. Of course, real surfaces are much more complicated, presenting domains, terraces and many other unavoidable deviations from the perfect, ideal models we use (see for example [7][8][9][10]). Along with such C surfaces, we will look at the effect of hydrogen coverage on graphene.…”

Section: Introductionmentioning

confidence: 99%

The fascinating physics of carbon surfaces: first-principles study of hydrogen on C(0 0 1), C(1 1 1) and graphene

Marsili¹,

Pulci²

2010

J. Phys. D: Appl. Phys.

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Abstract.With the aid of ab-initio, parameter free calculations based on densityfunctional and many-body perturbation theory, we investigate the electronic band structure and electron affinity of diamond surfaces. We focus on clean, ideal (001) and (111) surfaces, and on the effect of hydrogen adsorption. Also single sheets of graphane, that is graphene functionalized upon hydrogen, are investigated. At full H-coverage nearly-free electron states appear near the conduction band minimum in all the systems under study. At the same time, the electron affinity is strongly reduced becoming negative for the hydrogenated diamond surfaces, and almost zero in graphane. The effects of quasi-particle corrections on the electron affinity and on the nearly free electron states are discussed.Confidential: not for distribution.

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Section: Introductionmentioning

confidence: 99%

The fascinating physics of carbon surfaces: first-principles study of hydrogen on C(0 0 1), C(1 1 1) and graphene

Marsili¹,

Pulci²

2010

J. Phys. D: Appl. Phys.

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“…10 Reflection anisotropy spectroscopy (RAS) 15,16 is a technique that has found application in monitoring the growth of Si, Ge, and III-V compounds [17][18][19][20][21] and the interfaces that are important in the integration of Si, Ge, and GaAs technologies. [22][23][24][25] RAS has been applied to the C(100) surface 26 and to the O/C(100) surface 27 and is a suitable technique for monitoring the CVD growth of diamond and in particular surface processes associated with steps. RAS is an optical probe that achieves surface sensitivity by measuring the difference in reflection of normal incidence plane polarized light in two directions at right angles in the surface plane.…”

Section: Introductionmentioning

confidence: 99%

Contribution of steps to optical properties of vicinal diamond (100):H surfaces

et al. 2011

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We apply reflection anisotropy spectroscopy (RAS) to high-quality atomically smooth H/C(100) 2 × 1 surfaces. The optical signal of the H/C(100) 0 • flat surface, and of the H/C(100) 2 • and H/C(100) 4 • vicinal surfaces, is investigated in terms of single and double steps. A comparison of experimental and theoretical results obtained from ab initio calculations shows that, in the energy range considered (1-5 eV), the RAS response can be interpreted in terms of single height S B and double height D A steps.

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“…Here, many of the characterization techniques developed over several decades have been brought to bear, to attempt to quantify impurities and defects and ultimately assist in improving the crystal quality [17,18,15]. However, further, more novel techniques such as reflection anisotropy spectroscopy [19] and luminescence lifetime mapping [20] have been introduced to diamond in this issue, and one can see how such techniques might play a crucial role in areas such as systems for quantum information processing.…”

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confidence: 99%

Science's gem: diamond science 2009

Mainwood

Newton

Stoneham

2009

J. Phys.: Condens. Matter

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Natural diamond has been valued for its appearance and mechanical properties for at least two thousand years. As a gem stone diamond is unsurpassed. However, scientific work, especially in the last 20 years, has demonstrated that diamond has numerous surprising properties and many unique ones. Some of the extreme properties have been known for many years, but the true scale of diamond's other highly desirable features is still only coming to light as control in the synthesis of diamond, and hence material perfection, improves. The ultimate prize for man-made diamond is surely not in the synthesis of gem stones, but in delivering technological solutions enabled by diamond to the challenges facing our society today.If the special properties are to be exploited to their full potential, at least four crucial factors must be considered. First, there must be sufficient scientific understanding of diamond to make applications effective, efficient and economical. Secondly, the means of fabrication and control of properties have to be achieved so that diamond's role can be optimised. Thirdly, it is not enough that its properties are superior to existing materials: they must be so much better that it is worth initiating new technologies to exploit them. Finally, any substantial applications will have to address the society's major needs worldwide. The clear technology drivers for the 21st century come from the biomedical technologies, the demand for energy subject to global constraints, and the information technologies, where perhaps diamond will provide the major enabling technology [1].The papers in this volume concern the solid state physics of diamond, and primarily concern the first two factors: understanding, and control of properties. They address many of the outstanding basic problems, such as the identification of existing defects, which affect the material's properties, both desirable and less so. Regarding future substantial applications, one paper discusses diamond's exceptional properties for quantum information processing [2], a topic on which there have been many recent papers, and where a diamond colour centre single photon source is already commercially available. Biomedical applications of diamond are recognised, partly tribological and partly electrochemical, but lie outside the present group of papers. Processing and controlling diamond surfaces and interfaces with other materials in their environment are critical steps en route to exploitation. Boron-doped diamond has already found application in electro-analysis and in the bulk oxidation of dissolved species in solution [3]. Energy-related applications-ranging from high-power electronics [3] to a potential first wall of fusion reactors [4]-are further exciting potential applications. Even small and ugly diamonds have value. Their mechanical properties [5] dominate, with significant niche applications such as thermal sinks. The major applications for diamond to date exploit only a fraction of diamond's special properties: visual for status diamonds, an...

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Reflection anisotropy spectroscopy of the oxidized diamond (001) surface

Cited by 3 publications

References 20 publications

The fascinating physics of carbon surfaces: first-principles study of hydrogen on C(0 0 1), C(1 1 1) and graphene

The fascinating physics of carbon surfaces: first-principles study of hydrogen on C(0 0 1), C(1 1 1) and graphene

Contribution of steps to optical properties of vicinal diamond (100):H surfaces

Science's gem: diamond science 2009

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