Search Results - "Ekenberg, U"

Terahertz magneto-optical spectroscopy of a two-dimensional hole gas by Kamaraju, N., Pan, W., Ekenberg, U., Gvozdić, D. M., Boubanga-Tombet, S., Upadhya, P. C., Reno, J., Taylor, A. J., Prasankumar, R. P.

“…Two-dimensional hole gases (2DHGs) have attracted recent attention for their unique quantum physics and potential applications in areas including spintronics…”
Get full text

Analysis of electric-field-induced spin splitting in wide modulation-doped quantum wells by Ekenberg, U., Gvozdić, D. M.

“…We analyze the proper inclusion of electric-field-induced spin splittings in the framework of the envelope function approximation. We argue that the Rashba…”
Get full text

Efficient switching of Rashba spin splitting in wide modulation-doped quantum wells by Gvozdić, D. M., Ekenberg, U.

“…The authors demonstrate that the size of the electric-field-induced Rashba spin splitting in an 80 nm wide modulation-doped InGaSb quantum well can depend…”
Get full text

Superefficient electric-field–induced spin-orbit splitting in strained p-type quantum wells by Gvozdić, D. M, Ekenberg, U

“…We investigate theoretically the efficiency of the Rashba effect, i.e. the spin-orbit splitting resulting from an electric field. In contrast to previous…”
Get full text

Nonparabolicity effects in a quantum well: Sublevel shift, parallel mass, and Landau levels by Ekenberg, U

Get full text

Long-wavelength infrared quantum-dot based interband photodetectors by Gustafsson, O., Berggren, J., Ekenberg, U., Hallén, A., Hammar, M., Höglund, L., Karim, A., Noharet, B., Wang, Q., Gromov, A., Almqvist, S., Zhang, A., Junique, S., Andersson, J.Y., Asplund, C., Marcks von Würtemberg, R., Malm, H., Martijn, H.

“…We report on the design and fabrication of (Al)GaAs(Sb)/InAs tensile strained quantum-dot (QD) based detector material for thermal infrared imaging…”
Get full text

Superiority of p-type spin transistors by Gvozdić, D M, Ekenberg, U

“…The spintronic device that has probably stimulated the most research interest is the Datta-Das spin transistor. The mechanism behind it, called the Rashba…”
Get full text

Structural and optical properties of GaN/AlN multiple quantum wells for intersubband applications by Liu, X.Y., Fälth, J.F., Andersson, T.G., Holmström, P., Jänes, P., Ekenberg, U., Thylén, L.

“…GaN/AlN multiple quantum well structures of 1, 5 and 20 periods were grown by molecular beam epitaxy (MBE). To investigate structural parameters, symmetrical…”
Get full text

Beyond the Rashba model by Gvozdić, D.M., Ekenberg, U.

“…We analyze some common approximations made in connection with the Rashba effect, where a macroscopic electric field gives rise to a spin splitting. We…”
Get full text

Investigation of the super-efficient Rashba effect by simulation of Shubnikov–de Haas oscillations in a two-dimensional hole gas by Gvozdić, D.M., Ekenberg, U.

“…The Shubnikov–de Haas effect is frequently used for two-dimensional systems to determine individual subband populations, e.g. when the subbands are split by…”
Get full text

A high-speed intersubband modulator based on quantum interference in double quantum wells by Janes, P., Holmstrom, P., Ekenberg, U.

“…Calculations on a modulator based on quantum interference in AlGaAs/GaAs asymmetric double quantum wells (QWs) are performed. The modulation of the absorption…”
Get full text

Control of spontaneous spin splitting in an asymmetric quantum well with the use of strain and/or magnetic field by Ekenberg, U., Mauritz, O.

“…Spin-orbit coupling combined with inversion asymmetry gives rise to spin splitting even in the absence of an applied magnetic field. The size of this spin…”
Get full text

Magnetic-field-induced suppression of spontaneous spin-splitting of hole subbands by Mauritz, O., Ekenberg, U.

“…The spin-splitting in the valence band in an In x Ga 1− x As/In x Ga 1− x As y P 1− y quantum well is investigated theoretically using a 6×6 Luttinger–Kohn…”
Get full text

Proposal of an optical modulator based on resonant tunneling and intersubband transitions by Holmstrom, P., Thylen, L., Ukenberg, U.

“…We propose and analyze an optical modulator based on intersubband transitions. The absorption is modulated by modulating the carrier density in the ground…”
Get full text

Spin splitting in strained p-type quantum wells with and without an applied magnetic field by Mauritz, O, Ekenberg, U

Get full text

Anisotropic valence bands in quantum wells : quantitative comparison of theory and experiment by KASH, J. A, ZACHAU, M, TISCHLER, M. A, EKENBERG, U

Get full text

Strain-induced suppression of spin splitting in asymmetric p-type quantum wells by Mauritz, O., Ekenberg, U.

“…The strain dependence of the spin splitting of hole subbands in an asymmetric quantum well is investigated. It is found that the spin splitting can be…”
Get full text

Enhancement of nonparabolicity effects in a quantum well by EKENBERG, U

Get full text

Calculations of hole subbands in semiconductor quantum wells and superlattices by ALTARELLI, M, EKENBERG, U, FASOLINO, A

Get full text

Effective mass and band nonparabolicity in remote doped Si/Si0.8Ge0.2 quantum wells by Whall, T. E., Plews, A. D., Mattey, N. L., Phillips, P. J., Ekenberg, U.

“…The effective masses in remote doped Si/Si0.8Ge0.2/Si quantum wells having sheet densities, Ns in the range 2×1011–1.1×1012 cm−2 have been determined from the…”
Get full text