Zobrazeno 1 - 10
of 284
pro vyhledávání: '"Graef, H."'
Autor:
Pierret, A., Mele, D., Graef, H., Palomo, J., Taniguchi, T., Watanabe, K., Li, Y., Toury, B., Journet, C., Steyer, P., Garnier, V., Loiseau, A., Berroir, J-M., Bocquillon, E., Fève, G., Voisin, C., Baudin, E., Rosticher, M., Plaçais, B.
Publikováno v:
Mater. Res. Express 9 065901 (2022)
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
Externí odkaz:
http://arxiv.org/abs/2201.05826
Autor:
Graef, H., Wilmart, Q., Rosticher, M., Mele, D., Banszerus, L., Stampfer, C., Taniguchi, T., Watanabe, K., Berroir, J-M., Bocquillon, E., Fève, G., Teo, E. H. T., Plaçais, B.
Dirac fermion optics exploits the refraction of chiral fermions across optics-inspired Klein-tunneling barriers defined by high-transparency p-n junctions. We consider the corner reflector (CR) geometry introduced in optics or radars. We fabricate Di
Externí odkaz:
http://arxiv.org/abs/1901.02225
Autor:
Graef, H., Mele, D., Rosticher, M., Stampfer, C., Taniguchi, T., Watanabe, K., Bocquillon, E., Fève, G., Berroir, J-M., Teo, E. H. T., Plaçais, B.
Publikováno v:
J. Phys. Mater. 1 01LT02 (2018)
Graphene is a valuable 2D platform for plasmonics as illustrated in recent THz and mid-infrared optics experiments. These high-energy plasmons however, couple to the dielectric surface modes giving rise to hybrid plasmon-polariton excitations. Ultra-
Externí odkaz:
http://arxiv.org/abs/1806.08615
Autor:
Yang, W., Graef, H., Lu, X., Zhang, G., Taniguchi, T., Watanabe, K., Bachtold, A., Teo, E. H. T., Baudin, E., Bocquillon, E., Fève, G., Berroir, J-M., Carpentier, D., Goerbig, M. O., Plaçais, B.
Publikováno v:
Phys. Rev. Lett. 121, 136804 (2018)
Breakdown of the quantum Hall effect (QHE) is commonly associated with an electric field approaching the inter Landau-level (LL) Zener field, ratio of the Landau gap and cyclotron radius. Eluded in semiconducting heterostructures, in spite of extensi
Externí odkaz:
http://arxiv.org/abs/1805.05770
Autor:
Dembowski, C., Dietz, B., Friedrich, T., Graef, H. -D., Heine, A., Mejia-Monasterio, C., Miski-Oglu, M., Richter, A., Seligman, T. H.
Publikováno v:
Phys. Rev. Lett. 93, 134102 (2004)
A self-pulsing effect termed quantum echoes has been observed in experiments with an open superconducting and a normal conducting microwave billiard whose geometry provides soft chaos, i.e. a mixed phase space portrait with a large stable island. For
Externí odkaz:
http://arxiv.org/abs/nlin/0408046
Publikováno v:
Phys. Rev. E 69, 056216 (2004)
We calculate analytically the geometric phases that the eigenvectors of a parametric dissipative two-state system described by a complex symmetric Hamiltonian pick up when an exceptional point (EP) is encircled. An EP is a parameter setting where the
Externí odkaz:
http://arxiv.org/abs/nlin/0402015
In a recent paper [Phys. Rev. E 67, 026204 (2003)], Rotter calculates the geometric phases that are picked up by the eigenvectors of a two-state quantum system when an exceptional point is encircled. In addition to the geometric phases observed by De
Externí odkaz:
http://arxiv.org/abs/nlin/0309066
Publikováno v:
Phys.Rev.Lett.90:034101,2003
A microwave experiment has been realized to measure the phase difference of the oscillating electric field at two points inside the cavity. The technique has been applied to a dissipative resonator which exhibits a singularity -- called exceptional p
Externí odkaz:
http://arxiv.org/abs/nlin/0212023
Autor:
Dembowski, C., Dietz, B., Graef, H. -D., Heine, A., Leyvraz, F., Miski-Oglu, M., Richter, A., Seligman, T. H.
Publikováno v:
Phys. Rev. Lett. 90, 014102 (2003)
The spectral properties of a two-dimensional microwave billiard showing threefold symmetry have been studied with a new experimental technique. This method is based on the behavior of the eigenmodes under variation of a phase shift between two input
Externí odkaz:
http://arxiv.org/abs/nlin/0211033
Publikováno v:
Phys. Rev. Lett. 89, 064101 (2002)
We have measured resonance spectra in a superconducting microwave cavity with the shape of a three-dimensional generalized Bunimovich stadium billiard and analyzed their spectral fluctuation properties. The experimental length spectrum exhibits contr
Externí odkaz:
http://arxiv.org/abs/nlin/0206028