Zobrazeno 1 - 10
of 116
pro vyhledávání: '"Lepsa M"'
Autor:
Schreiber, L. R., Schwark, C., Güntherodt, G., Lepsa, M., Adelmann, C., Palmstrøm, C. J., Lou, X., Crowell, P. A., Beschoten, B.
Publikováno v:
Phys. Rev. B 104, 195202 (2021)
The precise control of spins in semiconductor spintronic devices requires electrical means for generating spin packets with a well-defined initial phase. We demonstrate a pulsed electrical scheme that triggers the spin ensemble phase in a similar way
Externí odkaz:
http://arxiv.org/abs/2111.09242
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:
Stepanov, I., Ersfeld, M., Poshakinskiy, A. V., Lepsa, M., Ivchenko, E. L., Tarasenko, S. A., Beschoten, B.
Zitterbewegung is a striking consequence of relativistic quantum mechanics which predicts that free Dirac electrons exhibit a rapid trembling motion even in the absence of external forces. The trembling motion of an electron results from the interfer
Externí odkaz:
http://arxiv.org/abs/1612.06190
Publikováno v:
Appl. Phys. Lett. 104, 062406 (2014)
We demonstrate all-electrical spin generation and subsequent manipulation by two successive electric field pulses in an n-InGaAs heterostructure in a time-resolved experiment at zero external magnetic field. The first electric field pulse along the $
Externí odkaz:
http://arxiv.org/abs/1312.4985
Autor:
Kuhlen, S., Schmalbuch, K., Hagedorn, M., Schlammes, P., Patt, M., Lepsa, M., Güntherodt, G., Beschoten, B.
Publikováno v:
Phys. Rev. Lett. 109, 146603 (2012)
Full electric-field control of spin orientations is one of the key tasks in semiconductor spintronics. We demonstrate that electric field pulses can be utilized for phase-coherent +/- pi spin rotation of optically generated electron spin packets in I
Externí odkaz:
http://arxiv.org/abs/1107.4307
Autor:
Schmalbuch, K., Göbbels, S., Schäfers, Ph., Rodenbücher, Ch., Schlammes, P., Schäpers, Th., Lepsa, M., Güntherodt, G., Beschoten, B.
Publikováno v:
Phys. Rev. Lett. 105, 246603 (2010)
Optical absorption of circularly polarized light is well known to yield an electron spin polarization in direct band gap semiconductors. We demonstrate that electron spins can even be generated with high efficiency by absorption of linearly polarized
Externí odkaz:
http://arxiv.org/abs/1008.0157
Publikováno v:
Appl. Phys. A 87, 559 (2007)
We show that nanoscale doping profiles inside a nanocolumn in combination with Fermi-level pinning at the surface give rise to the formation of a saddle-point in the potential profile. Consequently, the lateral confinement inside the channel varies a
Externí odkaz:
http://arxiv.org/abs/cond-mat/0609057
Akademický článek
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Autor:
Khanbabaee, B., Bussone, G., Knutsson, J. V., Geijselaers, I., Pryor, C. E., Rieger, T., Demarina, N., Grützmacher, D., Lepsa, M. I., Timm, R., Pietsch, U.
Publikováno v:
Journal of Applied Physics; 2016, Vol. 120 Issue 14, p1-8, 8p, 1 Color Photograph, 2 Diagrams, 2 Graphs
Publikováno v:
Applied Physics A: Materials Science & Processing. Jun2007, Vol. 87 Issue 3, p545-558. 14p. 1 Black and White Photograph, 7 Diagrams, 3 Charts, 20 Graphs.