Zobrazeno 1 - 10
of 483
pro vyhledávání: '"Ellenberger C"'
Autor:
Ihn, T., Ellenberger, C., Ensslin, K., Yannouleas, Constantine, Landman, Uzi, Driscoll, D. C., Gossard, A. C.
Publikováno v:
AIP Conference Proceedings 893, 783 (2007)
Measurements and a theoretical interpretation of the excitation spectrum of a two-electron quantum dot fabricated on a parabolic Ga[Al]As quantum well are reported. Experimentally, excited states are found beyond the well-known lowest singlet- and tr
Externí odkaz:
http://arxiv.org/abs/2112.14245
Autor:
Meier, L., Salis, G., Moll, N., Ellenberger, C., Shorubalko, I., Wahlen, U., Ensslin, K., Gini, E.
Publikováno v:
Applied Physics Letters 91, 162507 (2007)
The magnetic stray field from Fe gates is used to modify the spin precession frequency of InGaAs/GaAs quantum-well electrons in an external magnetic field. By using an etching process to position the gates directly in the plane of the quantum well, t
Externí odkaz:
http://arxiv.org/abs/0709.2120
Publikováno v:
Phys. Rev. B 74, 245318 (2006)
Time-resolved Faraday rotation is used to measure the coherent electron spin precession in a GaAs/InGaAs quantum well below an interdigitated magnetized Fe grating. We show that the electron spin precession frequency can be modified by applying a gat
Externí odkaz:
http://arxiv.org/abs/cond-mat/0612558
Autor:
Ihn, T., Ellenberger, C., Yannouleas, C., Landman, U., Ensslin, K., Driscoll, D., Gossard, A. C.
We present measurements and theoretical interpretation of the magnetic field dependent excitation spectra of a two-electron quantum dot. The quantum dot is based on an Al$_x$Ga$_{1-x}$As parabolic quantum well with effective $g^\star$-factor close to
Externí odkaz:
http://arxiv.org/abs/cond-mat/0610019
Publikováno v:
Appl. Phys. Lett. 88, 172501 (2006)
Electron spins in an InGaAs semiconductor quantum well are used as a magnetometer of magnetic stray-fields from patterned Fe stripes. Using time-resolved Faraday rotation, the coherent precession of quantum-well spins in the inhomogeneous field below
Externí odkaz:
http://arxiv.org/abs/cond-mat/0603296
Autor:
Ellenberger, C., Simovic, B., Leturcq, R., Ihn, T., Ulloa, S. E., Ensslin, K., Driscoll, D. C., Gossard, A. C.
Publikováno v:
Phys. Rev. B 74, 195313 (2006)
The low-temperature magnetoresistance of parabolic quantum wells displays pronounced minima between integer filling factors. Concomitantly the Hall effect exhibits overshoots and plateau-like features next to well-defined ordinary quantum Hall platea
Externí odkaz:
http://arxiv.org/abs/cond-mat/0602271
Autor:
Ellenberger, C., Ihn, T., Yannouleas, C., Landman, U., Ensslin, K., Driscoll, D., Gossard, A. C.
Publikováno v:
Phys. Rev. Lett. 96, 126806 (2006)
The excitation spectrum of a two-electron quantum dot is investigated by tunneling spectroscopy in conjuction with theoretical calculations. The dot made from a material with negligible Zeeman splitting has a moderate spatial anisotropy leading to a
Externí odkaz:
http://arxiv.org/abs/cond-mat/0512410
Publikováno v:
Phys.Rev.B 71, 233303 (2005)
We have measured the magneto-resistance of a two-dimensional electron gas (2DEG) under continuous microwave irradiation as a function of electron density and mobility tuned with a metallic top-gate. In the entire range of density and mobility we have
Externí odkaz:
http://arxiv.org/abs/cond-mat/0502350
Publikováno v:
Appl. Phys. Lett. 85, 2277 (2004)
High-quality C-doped p-type AlGaAs heterostructures with mobilities exceeding 150 000 cm$^2$/Vs are investigated by low-temperature magnetotransport experiments. We find features of the fractional quantum Hall effect as well as a highly resolved Shub
Externí odkaz:
http://arxiv.org/abs/cond-mat/0406417
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