Zobrazeno 1 - 10
of 70
pro vyhledávání: '"H. Graef"'
Autor:
P. Huang, E. Riccardi, S. Messelot, H. Graef, F. Valmorra, J. Tignon, T. Taniguchi, K. Watanabe, S. Dhillon, B. Plaçais, R. Ferreira, J. Mangeney
Publikováno v:
Nature Communications, Vol 11, Iss 1, Pp 1-9 (2020)
Long carrier lifetimes are beneficial for graphene-based optoelectronics, but carrier recombination processes in graphene possess sub-picosecond characteristic times. Here, the authors report carrier lifetimes ~30 ps at low energy in graphene/hBN Zen
Externí odkaz:
https://doaj.org/article/5237567f74614181b25bebee4a7106aa
Autor:
H. Graef, Q. Wilmart, M. Rosticher, D. Mele, L. Banszerus, C. Stampfer, T. Taniguchi, K. Watanabe, J.-M. Berroir, E. Bocquillon, G. Fève, E. H. T. Teo, B. Plaçais
Publikováno v:
Nature Communications, Vol 10, Iss 1, Pp 1-9 (2019)
Dirac fermion optics leverages p-n junctions and Klein tunnelling barriers present in materials to implement complex optical functions and devices, including reflectors, collimators, and Dirac fermion microscopes. Here, the authors fabricate Dirac fe
Externí odkaz:
https://doaj.org/article/b36f46e5e6fd4fffa04dd63c54e64e9f
Autor:
A Pierret, D Mele, H Graef, J Palomo, T Taniguchi, K Watanabe, Y Li, B Toury, C Journet, P Steyer, V Garnier, A Loiseau, J-M Berroir, E Bocquillon, G Fève, C Voisin, E Baudin, M Rosticher, B Plaçais
Publikováno v:
Materials Research Express
Materials Research Express, 2022, 9 (6), pp.065901. ⟨10.1088/2053-1591/ac4fe1⟩
Materials Research Express, 2022, 9 (6), pp.065901. ⟨10.1088/2053-1591/ac4fe1⟩
In view of the extensive use of hexagonal boron nitride (hBN) in 2D material electronics, it becomes important to refine its dielectric characterization in terms of low-field permittivity and high-field strength and conductivity up to the breakdown v
Autor:
Paul Sabas Saidia, D. Kiobia, Frieder Graef, F. C. Kahimba, Bettina Eichler-Löbermann, H. Graef
Publikováno v:
Communications in Soil Science and Plant Analysis. 49:2905-2917
Low, erratic rainfall amounts and restricted accessibility of chemical fertilizer for rural farmers in developing countries may have negative effects on crop production. Agricultural methods like b...
Autor:
J. Tignon, Bernard Plaçais, T. Taniguchi, E. Riccardi, S. Dhillon, H. Graef, P. Huang, R. Ferreira, Federico Valmorra, S. Messelot, J. Mangeney, K. Watanabe
Publikováno v:
2020 45th International Conference on Infrared, Millimeter, and Terahertz Waves (IRMMW-THz).
We report on carrier lifetimes in graphene/hBN heterostructures of ~30 ps for photoexcited carriers at low density and energy, using mid-infrared photoconductivity measurements. We further demonstrate the switching of carrier lifetime from ~30 ps (at
Akademický článek
Tento výsledek nelze pro nepřihlášené uživatele zobrazit.
K zobrazení výsledku je třeba se přihlásit.
K zobrazení výsledku je třeba se přihlásit.
Akademický článek
Tento výsledek nelze pro nepřihlášené uživatele zobrazit.
K zobrazení výsledku je třeba se přihlásit.
K zobrazení výsledku je třeba se přihlásit.
Publikováno v:
Journal of Atmospheric and Solar-Terrestrial Physics. 64:1147-1166
Rotational temperatures are derived from measurements of the (3-1) transitions of the OH Meinel bands. They are found to be a reasonable proxy for atmospheric kinetic temperatures at an altitude of 3×10 −3 hPa (87 km ). Measurements were taken in
Akademický článek
Tento výsledek nelze pro nepřihlášené uživatele zobrazit.
K zobrazení výsledku je třeba se přihlásit.
K zobrazení výsledku je třeba se přihlásit.
Autor:
Claude Souprayen, Chris Meek, Ulf-Peter Hoppe, Werner Singer, H. H. Graef, A. H. Manson, A.N. Fakhrutdinova, Jan Laštovička, Alain Hauchecorne, Esteban Rodolfo Reisin, J. Bos̆ka, N. Gonzalez, Jürgen Scheer
Publikováno v:
Journal of Atmospheric and Terrestrial Physics. 56:1765-1778
The DYANA campaign in early 1990 gave a unique opportunity to study the gravity wave (GW) activity in the middle atmosphere in relation to the general circulation. Several instruments, including Rayleigh lidars, ME and meteor radars, OH and O 2 spect