Zobrazeno 1 - 10
of 1 061
pro vyhledávání: '"GRÜTZMACHER, D."'
Surface phonon-polaritons propagating along interfaces of polar dielectrics coexist with excitons in many van der Waals heterostructures, so understanding their mutual interactions is of great interest. Here, we investigate the type I surface phonon
Externí odkaz:
http://arxiv.org/abs/2402.04439
Autor:
Lyatti, M., Gundareva, I., Röper, T., Popovic, Z., Jalil, A. R., Grützmacher, D., Schäpers, T.
The d-wave symmetry of the order parameter with zero energy gap in nodal directions stands in the way of using high-temperature superconductors for quantum applications. We investigate the symmetry of the order parameter in ultra-thin YBa2Cu3O7-x (YB
Externí odkaz:
http://arxiv.org/abs/2304.03591
We fabricate high-quality c-axis oriented epitaxial YBa$_2$Cu$_3$O$_{7-x}$ films with 15% of yttrium atoms replaced by terbium (YTBCO) and study their electrical properties. The Tb substitution reduces the charge carrier density resulting in increase
Externí odkaz:
http://arxiv.org/abs/2211.02564
Autor:
Kutovyi, Y., Jansen, M. M., Qiao, S., Falter, C., Driesch, N. von den, Brazda, T., Demarina, N., Trellenkamp, S., Bennemann, B., Grützmacher, D., Pawlis, A.
Isolated impurity states in epitaxially grown semiconductor systems possess important radiative features such as distinct wavelength emission with a very short radiative lifetime and low inhomogeneous broadening which makes them promising for the gen
Externí odkaz:
http://arxiv.org/abs/2205.10109
Autor:
Schumann, T., Kleinke, T., Braun, L., Meyer, N., Mussler, G., Kampmeier, J., Grützmacher, D., Schmoranzerova, E., Olejník, K., Reichlová, H., Heiliger, C., Denker, C., Walowski, J., Kampfrath, T., Münzenberg, M.
We study laser driven spin-current effects at ferromagnet/topological-insulator interfaces by two complementary experimental approaches. The DC photocurrent is studied in ferromagnet/topological-insulator bilayers with high spatial resolution. Dynami
Externí odkaz:
http://arxiv.org/abs/2202.01522
Autor:
Zellekens, P., Demarina, N., Janßen, J., Rieger, T., Lepsa, M. I., Perla, P., Panaitov, G., Lüth, H., Grützmacher, D., Schäpers, T.
Publikováno v:
Semicond. Sci. Technol. (2020)
Low-temperature magnetotransport measurements are performed on GaAs/InSb core-shell nanowires. The nanowires were self-catalyzed grown by molecular beam epitaxy. The conductance measurements as a function of back-gate voltage show an ambipolar behavi
Externí odkaz:
http://arxiv.org/abs/1911.05510
Autor:
Narayan, V., Verpoort, P. C., Dann, J. R. A., Backes, D., Ford, C. J. B., Lanius, M., Jalil, A. R., Schüffelgen, P., Mussler, G., Conduit, G. J., Grützmacher, D.
Publikováno v:
Phys. Rev. B 100, 024504 (2019)
We report non-equilibrium magnetodynamics in the Rashba-superconductor GeTe, which lacks inversion symmetry in the bulk. We find that at low temperature the system exhibits a non-equilibrium state, which decays on time scales that exceed conventional
Externí odkaz:
http://arxiv.org/abs/1902.04675
Autor:
Schumann, T., Meyer, N., Mussler, G., Kampmeier, J., Grützmacher, D., Schmoranzerova, E., Braun, L., Kampfrath, T., Walowski, J., Münzenberg, M.
The theoretical prediction of topological insulators in 2007 triggered tremendous interest. They are of fundamental interest because of their topological twist in k-space, which comes along with unidirectional, spin-polarized surface-state currents,
Externí odkaz:
http://arxiv.org/abs/1810.12799
Autor:
Plank, H., Pernul, J., Gebert, S., Danilov, S. N., König-Otto, J., Winnerl, S., Lanius, M., Kampmeier, J., Mussler, G., Aguilera, I., Grützmacher, D., Ganichev, S. D.
Publikováno v:
Phys. Rev. Materials 2, 024202 (2018)
We report on the systematic study of infrared/terahertz spectra of photocurrents in (Bi,Sb)Te based three dimensional topological insulators. We demonstrate that in a wide range of frequencies, ranging from fractions up to tens of terahertz, the phot
Externí odkaz:
http://arxiv.org/abs/1711.11457
Autor:
Heedt, S., Ziani, N. Traverso, Crépin, F., Prost, W., Trellenkamp, St., Schubert, J., Grützmacher, D., Trauzettel, B., Schäpers, Th.
Publikováno v:
Nat. Phys. 13, 563-567 (2017)
Spin-momentum locking in a semiconductor device with strong spin-orbit coupling (SOC) is a fundamental goal of nanoscale spintronics and an important prerequisite for the formation of Majorana bound states. Such a helical state is predicted in one-di
Externí odkaz:
http://arxiv.org/abs/1701.08439