ALBERT — All Library Books, journals and Electronic Records Telegrafenberg

11

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Identification of ${\mathrm{Ni}}_{2}\mathrm{C}$ electronic states in graphene-Ni(111) growth through resonant and dichroic angle-resolved photoemission at the C $K$-edge (2017)

G. Drera, C. Cepek, L. L. Patera, F. Bondino, E. Magnano, S. Nappini, C. Africh, A. Lodi-Rizzini, N. Joshi, P. Ghosh, A. Barla, S. K. Mahatha, S. Pagliara, A. Giampietri, C. Pintossi, and L. Sangaletti

American Physical Society (APS)

In: Physical Review B

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Publikationsdatum: 2017-10-31

Beschreibung: Author(s): G. Drera, C. Cepek, L. L. Patera, F. Bondino, E. Magnano, S. Nappini, C. Africh, A. Lodi-Rizzini, N. Joshi, P. Ghosh, A. Barla, S. K. Mahatha, S. Pagliara, A. Giampietri, C. Pintossi, and L. Sangaletti The graphene-Ni(111) (GrNi) growth via chemical vapor deposition has been explored by resonant, angle-resolved, and dichroic photoemission spectroscopy (soft x-ray Res-ARPES) in order to identify the possible contributions to the electronic structure deriving from different phases that can coexist i... [Phys. Rev. B 96, 165442] Published Mon Oct 30, 2017

Schlagwort(e): Surface physics, nanoscale physics, low-dimensional systems

Print ISSN: 1098-0121

Digitale ISSN: 1095-3795

Thema: Physik

Publiziert von American Physical Society (APS)

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Intersubband scattering in $n$-GaAs/AlGaAs wide quantum wells (2018)

I. L. Drichko, I. Yu. Smirnov, M. O. Nestoklon, A. V. Suslov, D. Kamburov, K. W. Baldwin, L. N. Pfeiffer, K. W. West, and L. E. Golub

American Physical Society (APS)

In: Physical Review B

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Publikationsdatum: 2018-02-21

Beschreibung: Author(s): I. L. Drichko, I. Yu. Smirnov, M. O. Nestoklon, A. V. Suslov, D. Kamburov, K. W. Baldwin, L. N. Pfeiffer, K. W. West, and L. E. Golub Slow magneto-oscilations of the conductivity are observed in a 75-nm-wide quantum well at heating of the two-dimensional electrons by a high-intensity surface acoustic wave. These magneto-oscillations are caused by intersubband elastic scattering between the symmetric and asymmetric subbands formed ... [Phys. Rev. B 97, 075427] Published Tue Feb 20, 2018

Schlagwort(e): Surface physics, nanoscale physics, low-dimensional systems

Print ISSN: 1098-0121

Digitale ISSN: 1095-3795

Thema: Physik

Publiziert von American Physical Society (APS)

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Spin properties of dense near-surface ensembles of nitrogen-vacancy centers in diamond (2018)

J.-P. Tetienne, R. W. de Gille, D. A. Broadway, T. Teraji, S. E. Lillie, J. M. McCoey, N. Dontschuk, L. T. Hall, A. Stacey, D. A. Simpson, and L. C. L. Hollenberg

American Physical Society (APS)

In: Physical Review B

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Publikationsdatum: 2018-02-03

Beschreibung: Author(s): J.-P. Tetienne, R. W. de Gille, D. A. Broadway, T. Teraji, S. E. Lillie, J. M. McCoey, N. Dontschuk, L. T. Hall, A. Stacey, D. A. Simpson, and L. C. L. Hollenberg We present a study of the spin properties of dense layers of near-surface nitrogen-vacancy (NV) centers in diamond created by nitrogen ion implantation. The optically detected magnetic resonance contrast and linewidth, spin coherence time, and spin relaxation time, are measured as a function of impl... [Phys. Rev. B 97, 085402] Published Fri Feb 02, 2018

Schlagwort(e): Surface physics, nanoscale physics, low-dimensional systems

Print ISSN: 1098-0121

Digitale ISSN: 1095-3795

Thema: Physik

Publiziert von American Physical Society (APS)

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All-electrical generation of spin-polarized currents in quantum spin Hall insulators (2017)

L. L. Tao, K. T. Cheung, L. Zhang, and J. Wang

American Physical Society (APS)

In: Physical Review B

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Publikationsdatum: 2017-03-25

Beschreibung: Author(s): L. L. Tao, K. T. Cheung, L. Zhang, and J. Wang The control and generation of spin-polarized current (SPC) without magnetic materials and an external magnetic field is a big challenge in spintronics and normally requires a spin-flip mechanism. In this Rapid Communication, we show the theoretical discovery of all-electrical generation of SPC witho… [Phys. Rev. B 95, 121407(R)] Published Fri Mar 24, 2017

Schlagwort(e): Surface physics, nanoscale physics, low-dimensional systems

Print ISSN: 1098-0121

Digitale ISSN: 1095-3795

Thema: Physik

Publiziert von American Physical Society (APS)

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Occultation studies of the solar system (1986)

Millis, R. L. ; Wasserman, L. H. ; Franz, O. G. ; [weitere]

In: CASI

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Publikationsdatum: 2006-02-14

Beschreibung: Determination of the size, shape, mean density, and albedo of Ceres was made. Predictions for 133 occultations of bright stars occurring in 1986 and 1987 were completed and published, as have predictions of occultations of stars by Comet Halley. Twenty-nine mutual events involving Galilean satellites were observed at Flagstaff in 1985.

Schlagwort(e): ASTROPHYSICS

Materialart: NASA, Washington Reports of Planetary Astronomy, 1985; p 108-109

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The molecular gas in the supernova remnant IC443 (1986)

Dickman, R. L. ; Huang, Y. L. ; Snell, R. L.

In: CASI

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Publikationsdatum: 2016-06-07

Beschreibung: Although a few highly perturbed regions characterized by gas motions with velocities larger than 20 km/s have been discovered during the last several years in the supernova remnant (SNR) IC 443, the nature of these perturbed clumps and their relationship to the quiescent molecular gas near the SNR remains unknown. In part, this is due to a lack of large-scale, high angular resolution observations. Therefore, a systematic survey of this SNR in the CO (J=1 yields 0) line has been conducted, covering a roughly 50' x 50' region spaced by 2'. The observations were made with the 14 m telescope of the Five College Radio Astronomy Observatory (FCRAO), which has a resolution of 45" and a single sideband receiver temperature of 200 K at 2.6 mm wavelength. Five new clumps were discovered, bringing the total number of known perturbed regions to eight. To study the physical structure of these clumps in more detail, more complete maps of the clumps have been made in both the CO(J=1 yields 0) and (J=2 yields 1) transitions with the FCRAO telescope. These maps show that the extent of perturbed gas in a typical clump is several arcmin, or a few pc at a distance of 1.5 kpc.

Schlagwort(e): ASTROPHYSICS

Materialart: NASA. Ames Research Center Summer School on Interstellar Processes: Abstracts of Contributed Papers; p 69-70

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The missing bulge globular clusters in M31 - New optical candidates (1985)

Bruno, T. L. ; Wirth, A. ; Smarr, L. L.

In: Other Sources

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Publikationsdatum: 2019-06-28

Beschreibung: A new method to attack the question of the 'missing' globular clusters in the bulge of M31 is used. Image-processing techniques were used on 13 videocamera fields to obtain an accurate photometric census of stellar objects in M31's bulge down to a limiting B magnitude of 21. This luminosity distribution is compared with the Bahcall-Soneira model of galactic foreground stars. A statistically significant excess of bright images in the luminosity range of globular clusters at M31's distance is found. If the optical candidates considered prove to be globular clusters, they would double the number of known globular clusters in the surveyed region. The colors of a subsample of the candidates are the same as those of the known globular clusters. It is concluded that the previously observed flattening away from a de Vaucouleurs law in the radial distribution of M31 may be an observational selection effect. As an offshoot of this analysis, no evidence is found for very luminous stars in the inner bulge of M31. The lack of such stars indicates that there has not been active star formation (with a normal IMF) in the recent past. Coupled with the existence of many planetary nebulae in the bulge, this may strengthen the case for a galactic wind in M31's bulge.

Schlagwort(e): ASTROPHYSICS

Materialart: Astrophysical Journal, Part 1 (ISSN 0004-637X); 290; 140-153

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Spectral Properties of Hydrated Poorly Crystalline Materials for Spectral Analysis of the Moon and Mars (2019)

Bishop, J. L. ; Rampe, Elizabeth B. ; Baker, L. L. ; [weitere]

In: CASI

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Publikationsdatum: 2019-07-20

Beschreibung: Visible/near-infrared (VNIR) reflectance spectra of both Mars [1] and the Moon [2] include hydration bands that vary across the planet and are not well explained in some cases. Poorly crystalline phases have been found at ~30-70 wt.% by CheMin in Gale crater, Mars in all samples measured to date [3]. Here we report on VNIR reflectance spectra of a large collection of amorphous and poorly crystalline materials. These include opal, allophane, imogolite, iron hydroxides/ oxyhydroxides (FeOx), and several synthetic materials containing Si, Al and/or Fe. All of these contain hydration bands due to water and OH that can be used to identify these materials remotely on planetary bodies.

Schlagwort(e): Lunar and Planetary Science and Exploration

Materialart: JSC-E-DAA-TN66032 , Lunar and Planetary Science Conference; Mar 18, 2019 - Mar 22, 2019; Woodlands, TX; United States

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High-Resolution, Ground-Based Observations of the Lunar Sodium Exosphere During the Lunar Atmosphere and Dust Environment Explorer (LADEE) Mission (2018)

Spalsbury, L. C. ; Sarantos, Menelaos ; Gardner, D. D. ; [weitere]

In: Other Sources

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Publikationsdatum: 2019-07-13

Beschreibung: We present the first comprehensive set of lunar exospheric line width and line width derived effective temperatures as a function of lunar phase (66 waxing phase to 79 waning phase). Data were collected between November 2013 and May 2014 during six observing runs at the National Solar Observatory McMath-Pierce Solar Telescope by applying high-resolution Fabry-Perot spectroscopy (R ~ 180,000) to observe emission from exospheric sodium (5,889.9509 , D2 line). The 3-arc min field of view of the instrument, corresponding to ~336 km at the mean lunar distance (384,400 km), was positioned at several locations off the lunar limb; only equatorial observations taken out to 950 km are presented here. We find the sodium effective temperature distribution to be approximately a symmetric function of lunar phase with respect to full Moon. Within magnetotail passage we find temperatures in the range of 2500-9000 K. For phase angles greater than 40deg we find that temperatures flatten out to ~1700 K.

Schlagwort(e): Lunar and Planetary Science and Exploration

Materialart: GSFC-E-DAA-TN61679 , Journal of Geophysical Research: Planets (ISSN 2169-9097) (e-ISSN 2169-9100); 123; 9; 2430-2444

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Characterizing Nanophase Materials on Mars: Spectroscopic Studies of Allophane and Imogolite (2018)

Jeute, T. J. ; Bishop, J. L. ; Rampe, E. B. ; [weitere]

In: CASI

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Publikationsdatum: 2019-07-13

Beschreibung: The presence of allophane and other nanophase materials on Mars indicates a time when water was intermittent and short lived. These materials likely represent partially altered or leached basaltic ash and therefore, could represent a geologic marker for where water was present on the Martian surface. Further, they may indicate regions of climate change, where surface water was not present long enough to form clays. Characterization of these materials is important for increasing spectral recognition capacities of our current Martian science array. Ongoing work suggests that variability in the Al:Si ratio of allophane can dictate the amount of both structural and adsorbed water in the crystalline structure.

Schlagwort(e): Lunar and Planetary Science and Exploration

Materialart: LPI Contrib. No. 2083-2137 , JSC-E-DAA-TN54276 , Lunar and Planetary Science Conference (LPSC); Mar 19, 2018 - Mar 23, 2018; Woodlands, TX; United States

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