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Van Hove, M.A.
Lawrence Berkeley Lab., CA (USA)1987
Lawrence Berkeley Lab., CA (USA)1987
AbstractAbstract
[en] The past of surface structure determination with low-energy electron diffraction (LEED) will be briefly reviewed, setting the stage for a discussion of recent and future developments. The aim of these developments is to solve complex and disordered surface structures. Some efficient solutions to the theoretical and experimental problems will be presented. Since the theoretical problems dominate, the emphasis will be on theoretical approaches to the calculation of the multiple scattering of electrons through complex and disordered surfaces. 49 refs., 13 figs., 1 tab
Source
Oct 1987; 35 p; 8. international summer institute in surface science; Milwaukee, WI (USA); 17-21 Aug 1987; CONF-8708195--1; Available from NTIS, PC A03/MF A01; 1 as DE88003863; Portions of this document are illegible in microfiche products.
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Van Hove, M.A.; Shuh, D.K.; Robinson, A.L.
Ernest Orlando Lawrence Berkeley National Lab., Advanced Light Source, Berkeley, CA (United States). Funding organisation: US Department of Energy (United States)2001
Ernest Orlando Lawrence Berkeley National Lab., Advanced Light Source, Berkeley, CA (United States). Funding organisation: US Department of Energy (United States)2001
AbstractAbstract
No abstract available
Primary Subject
Source
LBNL/ALS--43660; AC03-76SF00098; Journal Publication Date: November 2001
Record Type
Journal Article
Journal
Synchrotron Radiation News; ISSN 0894-0886;
; v. pp.1-4; [10 p.]

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Garcia de Abajo, F.J.; Van Hove, M.A.; Fadley, C.S.
Lawrence Berkeley National Lab., CA (United States). Funding organisation: USDOE Director, Office of Science (United States)2000
Lawrence Berkeley National Lab., CA (United States). Funding organisation: USDOE Director, Office of Science (United States)2000
AbstractAbstract
No abstract available
Source
LBNL--46033; AC03-76SF00098; Journal Publication Date: 15 February 2001
Record Type
Journal Article
Journal
Physical Review. B, Condensed Matter and Materials Physics; ISSN 1098-0121;
; v. 63(7); [10 p.]

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AbstractAbstract
[en] By means of an efficient dynamical LEED method, the surface structure of W(110) and W(100) faces are examined. It is found that the W(110) surface maintains the bulk structure, despite the possibility for the top tungsten atoms to settle into sites of higher coordination number. The W(100) face exhibits a possible contraction of the top atomic layer by 0.10 +- 0.10 A. These results fit into a trend correlating a top-layer contraction with the absence of close-packing in the top layer, i.e. with the roughness of the surface. (Auth.)
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Journal Article
Journal
Surface Science; v. 54(1); p. 91-100
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Smekal, W.; Werner, W.S.M.; Fadley, C.S.; Van Hove, M.A.
Ernest Orlando Lawrence Berkeley National Laboratory, Berkeley, CA (United States). Funding organisation: USDOE Director. Office of Science. Office of Basic Energy Sciences (United States); Austrian Science Foundation Project P15938-N02 (Austria)2004
Ernest Orlando Lawrence Berkeley National Laboratory, Berkeley, CA (United States). Funding organisation: USDOE Director. Office of Science. Office of Basic Energy Sciences (United States); Austrian Science Foundation Project P15938-N02 (Austria)2004
AbstractAbstract
[en] We investigate the extent of diffraction effects (coherent elastic scattering) in electron spectra measured on materials that do not exhibit perfect crystal structure, such as crystals with a high defect density, polycrystalline materials or even amorphous solids. A single scattering cluster (SSC) model was implemented to calculate photoelectron angular distributions for non-ideal crystals. As a first test, results obtained with this code were compared with a well established code for a perfect crystal. The two codes were found to give essentially identical results. Furthermore, SSC calculations of Ni2s photoelectron depth distributions averaged over crystal orientation so as to apply to an amorphous material were compared with Monte-Carlo (MC) simulations of elastic scattering, entirely based on a non-coherent scattering model. The two sets of results were semi-quantitatively consistent
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1 Mar 2004; [vp.]; LBNL--56969; AC03-76SF00098; Available from Ernest Orlando Lawrence Berkeley National Laboratory, Berkeley, CA (United States); Also published in: Journal of Electron Spectroscopy and Related Phenomena; ISSN 0368-2048;
; JESRAW; v. 137-140

Record Type
Miscellaneous
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Soares, E.A.; Leatherman, G.S.; Diehl, R.D.; Van Hove, M.A.
Ernest Orlando Lawrence Berkeley National Lab., CA (United States). Funding organisation: USDOE Director, Office of Science. Office of Basic Energy Studies. Division of Materials Sciences (United States)2000
Ernest Orlando Lawrence Berkeley National Lab., CA (United States). Funding organisation: USDOE Director, Office of Science. Office of Basic Energy Studies. Division of Materials Sciences (United States)2000
AbstractAbstract
[en] The temperature dependence of the first three interlayer distances of the Ag(111) surface was studied by low-energy electron diffraction (LEED) over the temperature range 128K to 723 K. The first three interlayer spacings and the effective Debye temperatures were extracted from the LEED analysis. At the lowest temperature, the first two interlayer spacings are slightly (0.5 percent) contracted. All three interlayer spacings increase with temperature, finally reaching expansions relative to the bulk of about 0.8 percent at the highest temperature studied. The effective surface Debye temperature is lowest for the outermost layer, increasing toward the bulk value for successive layers
Primary Subject
Source
LBNL--49718; AC03-76SF00098; Available from Ernest Orlando Lawrence Berkeley National Lab., CA (US); Journal Publication Date: 2000
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Journal Article
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Walters, C.F.; McCarty, K.F.; Soares, E.A.; Van Hove, M.A.
Ernest Orlando Lawrence Berkeley National Laboratory, Berkeley, CA (United States). Funding organisation: USDOE Director, Office of Science. Office of Basic Energy Studies. Division of Materials Sciences (United States)2000
Ernest Orlando Lawrence Berkeley National Laboratory, Berkeley, CA (United States). Funding organisation: USDOE Director, Office of Science. Office of Basic Energy Studies. Division of Materials Sciences (United States)2000
AbstractAbstract
[en] The temperature dependence of the first three interlayer distances of the Ag(111) surface was studied by low-energy electron diffraction (LEED) over the temperature range 128K to 723 K. The first three interlayer spacings and the effective Debye temperatures were extracted from the LEED analysis. At the lowest temperature, the first two interlayer spacings are slightly (0.5 percent) contracted. All three interlayer spacings increase with temperature, finally reaching expansions relative to the bulk of about 0.8 percent at the highest temperature studied. The effective surface Debye temperature is lowest for the outermost layer, increasing toward the bulk value for successive layers
Primary Subject
Source
LBNL--49720; AC03-76SF00098; Available from Ernest Orlando Lawrence Berkeley National Laboratory, Berkeley, CA (US); Journal Publication Date: Oct. 1, 2000
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Journal Article
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Omori, S.; Zhao, L.; Marchesini, S.; Van Hove, M.A.; Fadley, C.S.
Ernest Orlando Lawrence Berkeley National Laboratory, Berkeley, CA (United States). Funding organisation: USDOE Director, Office of Science. Office of Basic Energy Studies. Division of Materials Sciences (United States)2001
Ernest Orlando Lawrence Berkeley National Laboratory, Berkeley, CA (United States). Funding organisation: USDOE Director, Office of Science. Office of Basic Energy Studies. Division of Materials Sciences (United States)2001
AbstractAbstract
No abstract available
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Secondary Subject
Source
LBNL--48489; AC03-76SF00098; Journal Publication Date: January 1, 2002
Record Type
Journal Article
Journal
Physical Review. B, Condensed Matter and Materials Physics; ISSN 1098-0121;
; v. 65(1); [10 p.]

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Len, P.M.; Thevuthasan, S.; Kaduwela, A.P.; Van Hove, M.A.; Fadley, C.S.
Ernest Orlando Lawrence Berkeley National Lab., Advanced Light Source, Berkeley, CA (United States). Funding organisation: US Department of Energy (United States)1995
Ernest Orlando Lawrence Berkeley National Lab., Advanced Light Source, Berkeley, CA (United States). Funding organisation: US Department of Energy (United States)1995
AbstractAbstract
No abstract available
Primary Subject
Source
LBL--36940; LBNL/ALS--547; AC03-76SF00098; Available from Ernest Orlando Lawrence Berkeley National Lab., Advanced Light Source, Berkeley, CA (US); Journal Publication Date: September 20 1996
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Journal Article
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Lahtinen, J.; Vaari, J.; Kauraala, K.; Soares, E.A.; Van Hove, M.A.
Ernest Orlando Lawrence Berkeley National Lab., CA (United States). Funding organisation: USDOE Director, Office of Science. Office of Basic Energy Studies. Division of Materials Sciences (United States)1999
Ernest Orlando Lawrence Berkeley National Lab., CA (United States). Funding organisation: USDOE Director, Office of Science. Office of Basic Energy Studies. Division of Materials Sciences (United States)1999
AbstractAbstract
[en] The local adsorption structure of CO on Co(0001) was determined at 160 K using dynamical low-energy electron diffraction (LEED). The CO molecules in the (root3xroot3) R30 degrees-CO overlayer adopt the on-top site with the CO axis perpendicular to the surface and induce buckling in the top Co layer pulling the Co atom beneath the CO by 0.04 plus or minus 0.04 Angstrom outwards. The optimum length for the CO bond is 1.17 plus or minus 0.06 Angstrom and that for the C-Co distance 1.78 plus or minus 0.06 Angstrom. The first layer Co-Co distance is 2.04 Angstrom and thus only slightly expanded from the bulk value. The obtained structure is compared to other known CO structures on transition metals
Primary Subject
Source
LBNL--49721; AC03-76SF00098; Available from Ernest Orlando Lawrence Berkeley National Lab., CA (US); Journal Publication Date: 2000 Mar. 10
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