Zobrazeno 1 - 10
of 192
pro vyhledávání: '"Axel Svane"'
Autor:
Søren Roesgaard, Jacques Chevallier, Peter I. Gaiduk, John Lundsgaard Hansen, Pia Bomholt Jensen, Arne Nylandsted Larsen, Axel Svane, Peter Balling, Brian Julsgaard
Publikováno v:
AIP Advances, Vol 5, Iss 7, Pp 077114-077114-6 (2015)
Tin-containing nanocrystals, embedded in silicon, have been fabricated by growing an epitaxial layer of Si1−x−ySnxCy, where x = 1.6 % and y = 0.04 % on a silicon substrate, followed by annealing at various temperatures ranging from 650 ∘C to 90
Externí odkaz:
https://doaj.org/article/8f1de2ba40134b019ceabfd066790842
Autor:
Sumanta Sarkar, G. Vaitheeswaran, Sebastian C. Peter, Udumula Subbarao, Mercouri G. Kanatzidis, Axel Svane
Publikováno v:
Peter, S C, Subbarao, U, Sarkar, S, Vaitheeswaran, G, Svane, A & Kanatzidis, M G 2014, ' Crystal structure of Yb 2 CuGe 6 and Yb 3 Cu 4 Ge 4 and the valency of ytterbium ', Journal of Alloys and Compounds, vol. 589, pp. 405-411 . https://doi.org/10.1016/j.jallcom.2013.11.224
The Yb 2 CuGe 6 and Yb 3 Cu 4 Ge 4 compounds were synthesized from reaction mixtures using indium as flux. Both powder and single crystal X-ray diffraction data were used to refine the crystal structures. Yb 2 CuGe 6 crystallizes in the monoclinic sp
Autor:
Emmanouil Dimakis, G. Staszczak, Axel Svane, Tadeusz Suski, I. Gorczyca, Theodore D. Moustakas, N. E. Christensen, Xinqiang Wang
Publikováno v:
Gorczyca, I, Suski, T, Staszczak, G, Wang, X Q, Christensen, N E, Svane, A, Dimakis, E & Moustakas, T D 2014, ' Short period polar and nonpolar m InN/ n GaN superlattices ', Physica Status Solidi. C: Current Topics in Solid State Physics, vol. 11, no. 3-4, pp. 678–681 . https://doi.org/10.1002/pssc.201300424
The electronic structures of nonpolar short-period InN/GaN superlattices grown in the wurtzite a -direction, have been calculated and compared to earlier calculations for polar superlattices (grown in the c-direction). For the nonpolar superlattices
Publikováno v:
Gorczyca, I, Teisseyre, H, Suski, T, Christensen, N E & Svane, A 2016, ' Structural and electronic properties of wurtzite MgZnO and BeMgZnO alloys and their thermodynamic stability ', Journal of Applied Physics, vol. 120, no. 21, 215704 . https://doi.org/10.1063/1.4971177
Structural and electronic properties of MgZnO and BeMgZnO alloys are studied by the ab-initio Density Functional Theory method. Large band gap bowings are found for both kinds of alloys. The total energies as functions of the lattice constants are ca
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::48cd8395e08da9bfab707e9625468034
https://pure.au.dk/portal/da/publications/structural-and-electronic-properties-of-wurtzite-mgzno-and-bemgzno-alloys-and-their-thermodynamic-stability(3948d90b-d0c7-47be-850a-d5b1f3e0fec7).html
https://pure.au.dk/portal/da/publications/structural-and-electronic-properties-of-wurtzite-mgzno-and-bemgzno-alloys-and-their-thermodynamic-stability(3948d90b-d0c7-47be-850a-d5b1f3e0fec7).html
Autor:
C. S. Yadav, Sudhindra Rayaprol, Ashly Sebastian, G. Vaitheeswaran, Sebastian C. Peter, Udumula Subbarao, Axel Svane
Publikováno v:
Subbarao, U, Sebastian, A, Rayaprol, S, Yadav, C S, Svane, A, Vaitheeswaran, G & Peter, S C 2013, ' Metal flux crystal growth technique in the determination of ordered superstructure in EuInGe ', Crystal Growth & Design, vol. 13, no. 1, pp. 352-359 . https://doi.org/10.1021/cg301532b
High quality single crystals of EuInGe were grown from the reaction run with excess indium. X-ray diffraction investigations showed that EuInGe crystallizes with a pronounced subcell structure, superstructure of the ThSi type: Pnma space group, a = 4
Publikováno v:
Vaitheeswaran, G, Kanchana, V, Zhang, X, Ma, Y, Svane, A & Christensen, N E 2016, ' Calculated high-pressure structural properties, lattice dynamics and quasi particle band structures of perovskite fluorides KZnF 3, CsCaF 3 and BaLiF 3 ', Journal of Physics: Condensed Matter, vol. 28, no. 31, 315403 . https://doi.org/10.1088/0953-8984/28/31/315403
A detailed study of the high-pressure structural properties, lattice dynamics and band structures of perovskite structured fluorides KZnF3, CsCaF3 and BaLiF3 has been carried out by means of density functional theory. The calculated structural proper
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::29b84b8019251ca1a7b7bdcb02731489
https://pure.au.dk/portal/da/publications/calculated-highpressure-structural-properties-lattice-dynamics-and-quasi-particle-band-structures-of-perovskite-fluorides-kznf3-cscaf3-and-balif3(4bc790ba-e465-472e-a25c-43b5f98257d9).html
https://pure.au.dk/portal/da/publications/calculated-highpressure-structural-properties-lattice-dynamics-and-quasi-particle-band-structures-of-perovskite-fluorides-kznf3-cscaf3-and-balif3(4bc790ba-e465-472e-a25c-43b5f98257d9).html
Publikováno v:
Petit, L, Szotek, Z, Luders, M & Svane, A 2016, ' Rare-earth pnictides and chalcogenides from first-principles ', Journal of Physics: Condensed Matter, vol. 28, no. 22, 223001 . https://doi.org/10.1088/0953-8984/28/22/223001
This review tries to establish what is the current understanding of the rare-earth monopnictides and monochalcogenides from first principles. The rock salt structure is assumed for all the compounds in the calculations and wherever possible the elect
Publikováno v:
Gorczyca, I, Suski, T, Christensen, N E & Svane, A 2016, ' Band gaps and built-in electric fields in InAlN/GaN short period superlattices: Comparison with (InAlGa)N quaternary alloys ', Physical Review B, vol. 93, 165302 . https://doi.org/10.1103/PhysRevB.93.165302
The general trends in the behavior of the band gaps in short period superlattices (SLs) composed from InAlN and GaN layers and grown along the wurtzite $c$ axis have been analyzed for different alloy compositions and several thicknesses of quantum we
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::fa009c04231603e9807e6452a5ec4e6c
https://pure.au.dk/portal/da/publications/band-gaps-and-builtin-electric-fields-in-inalngan-short-period-superlattices-comparison-with-inalgan-quaternary-alloys(6f095e55-351d-45b5-8f17-c5e57c9ad775).html
https://pure.au.dk/portal/da/publications/band-gaps-and-builtin-electric-fields-in-inalngan-short-period-superlattices-comparison-with-inalgan-quaternary-alloys(6f095e55-351d-45b5-8f17-c5e57c9ad775).html
Publikováno v:
Olsen, J S, Jorgensen, J-E, Gerward, L, Vaitheeswaran, G, Kanchana, V & Svane, A 2012, ' Compressibility and structural stability of CeN from experiment and theory. The B1-B2 transition ', Journal of Alloys and Compounds, vol. 533, pp. 29-32 . https://doi.org/10.1016/j.jallcom.2012.04.018
The high-pressure structural stability of CeN is investigated by experiment and theory. Experiments are carried out by energy-dispersive X-ray diffraction and synchrotron radiation, using a diamond anvil cell, to a maximum pressure of 77 GPa. The exp
Autor:
Axel Svane, Georgiy Levchenko, A. Lyaschenko, V.B. Filipov, V. Kanchana, L. Gerward, Alicja Waśkowska, K. Ramesh Babu, G. Vaitheeswaran, J. Staun Olsen
Publikováno v:
Waśkowska, A, Gerward, L, Staun Olsen, J, Ramesh Babu, K, Vaitheeswaran, G, Kanchana, V, Svane, A, Filipov, V B, Levchenko, G & Lyaschenko, A 2011, ' Thermoelastic properties of ScB 2, TiB 2, YB 4 and HoB 4 : Experimental and theoretical studies ', Acta Materialia, vol. 59, no. 12, pp. 4886–4894 . https://doi.org/10.1016/j.actamat.2011.04.030
High-pressure X-ray diffraction in ScB2, TiB2, YB4 and HoB4 powders and single crystals has been studied using synchrotron radiation as well as conventional X-rays. The experimental results are supported by calculations using density functional theor