Electronic band structure of beryllium oxide

Sashin, Vladimir; Bolorizadeh, Mohammad Agha; Kheifets, Anatoli; Ford, Michael J.

doi:10.1088/0953-8984/15/21/306

Cited by 49 publications

(27 citation statements)

References 35 publications

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“…Hence there is a shift of about 2 eV in positions of the corresponding p-band peaks. A similar increase of the experimental bandgap was observed in our previous measurements of MgO [31] and BeO [51]. This discrepancy seems to be due to the failure of the LDA approximation to correctly describe electron correlation effects in insulating solids.…”

Section: Valence Bandsupporting

confidence: 85%

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Electronic band structure of calcium oxide

Bolorizadeh

Sashin

Kheifets³

et al. 2004

Journal of Electron Spectroscopy and Related Phenomena

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Abstract. We employed electron momentum spectroscopy (EMS) to measure the bulk electronic structure of calcium oxide. We extracted the electron momentum density (EMD), density of occupied states (DOS), band dispersions, bandwidths and intervalence bandgaps from the data. The results are compared with calculations based on the full potential linear muffin-tin orbital (FP-LMTO) approximation. While the bandwidths of 0.6 ± 0.2 eV and 1.2 ± 0.1 eV for the s-and p-bands, respectively, and their dispersions agree well with the LMTO calculation, the relative intensity of the two bands is at odds with the theory. The measured intervalence bandgap at the Γ-point of 16.5 ± 0.2 eV is larger by 2.1 eV than that from the LMTO calculation. The experimental bandwidth of the Ca 3p semi-core level of 0.7 ± 0.1 eV agrees with the LMTO prediction. The measured bandgap between this level and the s-band is 3.6 ± 0.2 eV. The Ca 3s-3p level splitting is in excellent agreement with the literature.

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Section: Valence Bandsupporting

confidence: 85%

“…The theory changes from 0.2 to 1.6 over the same momentum range. We observed a similar disagreement in the relative p-to -s-band EMD ratio for MgO [31] and BeO [51,52].…”

Section: P-bandsupporting

confidence: 65%

Electronic band structure of calcium oxide

Bolorizadeh

Sashin

Kheifets³

et al. 2004

Journal of Electron Spectroscopy and Related Phenomena

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“…BeO has excellent thermal stability in contact with both Si and III-V substrates, in agreement with the value of its Gibbs free energy [7]. The energy bandgap of bulk BeO (10.6 eV [8]) is among the highest and its dielectric constant is around 6.8 [9], which is very close to that of ALD Al 2 O 3 (about 7.1) [10]. The absence of p orbitals gives the Be atoms a small atomic radius.…”

Section: Introductionsupporting

confidence: 73%

A study of highly crystalline novel beryllium oxide film using atomic layer deposition

Yum

Akyol

Lei

et al. 2011

Journal of Crystal Growth

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“…Some of the most recent work has used Auger to monitor the oxidation of beryllium for the investigation of the electronic band structure of beryllium (Ref. 1) and a number of authors in the past have studied the KLL Auger transition in both beryllium (Refs. 2-4) and beryllium oxide (Refs.…”

Section: Introductionmentioning

confidence: 99%

Analysis of the Be KLL Auger Transition on Beryllium and Beryllium Oxide by AES

Mallinson

Castle

Watts

2013

Surface Science Spectra

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As-received beryllium, beryllium scribed in vacuum and beryllium oxide were analysed by Auger Electron Spectroscopy. As-received beryllium was analysed at low and high take off angles. Spectra produced demonstrate the change in the KLL structure with increasing oxygen concentration. Survey spectra as well as high resolution Be KLL and O KLL transitions were collected and are presented. INTRODUCTIONAs a continuation of the previous XPS investigation on beryllium, the KLL Auger transition of beryllium has been examined. It is shown herein that the beryllium metal signal is highly attenuated by the thin surface oxide layer, of $3 nm, due to the low kinetic energy of the transition. Upon removal of this oxide by scribing the metal surface in vacuum a striking increase in the beryllium signal is obtained. Little current literature is available regarding the Auger analysis of beryllium or beryllium compounds. Some of the most recent work has used Auger to monitor the oxidation of beryllium for the investigation of the electronic band structure of beryllium (Ref. 1) and a number of authors in the past have studied the KLL Auger transition in both beryllium (Refs. 2-4) and beryllium oxide (Refs. 1-5).The earliest work on clean beryllium observed two peaks in the derivative spectrum which were identified as 1s2s2s and 1s2p2p transitions at 92 eV and 104 eV respectively (Ref. 2). Another study confirmed the presence of a large sharp peak at 104.5 eV however no peak was observed at 92 eV. In addition to the large peak at 104.5 eV two small peaks at 84 and 60 eV were observed which were believed to be first and second order plasmon losses of the main peak (Ref. 3). Oxidation of the beryllium surface leads to formation of a strong peak at 94 eV and weaker satellites at 85, 77 and 66 eV (Ref. 3). It is concluded that clean beryllium has a large Auger peak at 104.5 eV and beryllium oxide at 94 eV. Later work confirmed that no peak is observed at 92 eV on clean, oxide free, beryllium, with the main peak position at $104 eV (Ref. 4). Beryllium oxide has also been confirmed to show a main peak at 94 eV and three satellites with positions approximately 87, 77 and 67 eV (Ref. 5).The main peak in BeO was confirmed to shift by $10 eV from that of Be (Refs. 1 and 5), the main peak at 95 eV and the satellite at 86 eV originate from the 1s2p2p transitions involving electrons from the top and bottom of the p-band respectively. The satellite at 78 eV is believed to be due to the 1s2p2s transition and the satellite at 68 eV is thought to be an energy loss feature (Ref. 5).In this work spectra are presented that show the main Auger transition for beryllium and beryllium oxide. The beryllium metal differential spectrum shows the primary peak at 108.8 eV together with a loss satellite at 91 eV. The native oxide differential spectrum contains the metal component at 108.3 eV, the main oxide component at 97 eV as well as a number of satellites at 88.5, 81 and 70 eV. The spectrum of native beryllium oxide film was acquired by tilting the sample ...

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Electronic band structure of beryllium oxide

Cited by 49 publications

References 35 publications

Electronic band structure of calcium oxide

Electronic band structure of calcium oxide

A study of highly crystalline novel beryllium oxide film using atomic layer deposition

Analysis of the Be KLL Auger Transition on Beryllium and Beryllium Oxide by AES

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