Zobrazeno 1 - 10
of 316
pro vyhledávání: '"N. E. Christensen"'
Autor:
null N. Tit, null N. E. Christensen
Publikováno v:
Experimental and Theoretical NANOTECHNOLOGY. :203-230
Electronic band structures and charge densities of GaN, AlN, and their alloy Ga0.5Al0.5N in zinc-blende structure using empirical pseudopotential method are investigated. For the Ga1-xAlxN ternary alloy, the virtual crystal approximation is coupled w
Autor:
D. Jarosz, Anna Reszka, Henryk Teisseyre, N. E. Christensen, Fabrice Donatini, J. Z. Domagala, Małgorzata Wierzbowska, D. Le Si Dang, I. Gorczyca
Publikováno v:
Physical Review B. 102
Autor:
I. Gorczyca, Anna Reszka, Małgorzata Wierzbowska, Henryk Teisseyre, J. Z. Domagala, Fabrice Donatini, N. E. Christensen, D. Le Si Dang, D. Jarosz
Publikováno v:
Gorczyca, I, Wierzbowska, M, Jarosz, I D, Domagala, J Z, Reszka, A, Dang, D L S, Donatini, F, Christensen, N E & Teisseyre, H 2020, ' Rocksalt ZnMgO alloys for ultraviolet applications : Origin of band-gap fluctuations and direct-indirect transitions ', Physical Review B, vol. 101, no. 24, 245202 . https://doi.org/10.1103/PhysRevB.101.245202
Rocksalt $\mathrm{Z}{\mathrm{n}}_{x}\mathrm{M}{\mathrm{g}}_{1\ensuremath{-}x}\mathrm{O}$ alloys are theoretically and experimentally investigated for near- and deep-UV optoelectronics with a tunable band gap of 4.2--7.8 eV. Regarding the key question
Publikováno v:
Sreeparvathy, P C, Kanchana, V, Vaitheeswaran, G & Christensen, N E 2016, ' ZnGeSb 2 : a promising thermoelectric material with tunable ultra-high conductivity ', Physical Chemistry Chemical Physics, vol. 18, no. 37, 26275, pp. 26275-26283 . https://doi.org/10.1039/c6cp05446c
First principles calculations predict the promising thermoelectric material ZnGeSb2 with a huge power factor (S2σ/τ) on the order of 3 × 1017 W m−1 K−2 s−1, due to the ultra-high electrical conductivity scaled by a relaxation time of around
Publikováno v:
Gorczyca, I, Suski, T, Strak, P, Staszczak, G & Christensen, N E 2017, ' Band gap engineering of In(Ga) N/GaN short period superlattices ', Scientific Reports, vol. 7, 16055 . https://doi.org/10.1038/s41598-017-16022-z
Scientific Reports, Vol 7, Iss 1, Pp 1-9 (2017)
Scientific Reports
Scientific Reports, Vol 7, Iss 1, Pp 1-9 (2017)
Scientific Reports
Discussion of band gap behavior based on first principles calculations of the electronic band structures for several InN/GaN superlattices (SLs) (free-standing and pseudomorphic) grown along different directions (polar and nonpolar) is presented. Tak
Publikováno v:
Journal of physics. Condensed matter : an Institute of Physics journal. 29(26)
A detailed study on the ternary Zr-based intermetallic compound Zr
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:
J.M. Sajkowski, I. Gorczyca, Henryk Teisseyre, M. Stachowicz, Adrian Kozanecki, N. E. Christensen, K. Skrobas
Publikováno v:
Gorczyca, I, Skrobas, K, Christensen, N E, Sajkowski, J, Stachowicz, M, Teisseyre, H & Kozanecki, A 2019, ' ZnO/(Zn)MgO polar and nonpolar superlattices ', Journal of Applied Physics, vol. 125, no. 13, 135702 . https://doi.org/10.1063/1.5085055
The bandgaps of short period ZnO/(Zn)MgO superlattices deposited on c-, m-, and a-ZnO substrates were examined both theoretically and experimentally. Ab initio calculations showed that the bandgaps of c-oriented polar superlattices are smaller than t
Publikováno v:
Physical chemistry chemical physics : PCCP. 18(37)
First principles calculations predict the promising thermoelectric material ZnGeSb