Search Results - "Portal, J.C"

Microwave radiation induced collective response in Si/SiGe heterostructures with a 2D electron gas by Sassine, S., Krupko, Yu, Olshanetsky, E.B., Kvon, Z.D., Portal, J.C., Hartmann, J.M., Zhang, J.

“…The collective resonant photoresponse in Si/SiGe structures with a 2DEG under microwave radiation is reported for the first time. The application of microwave…”
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Validation of an EIA [enzyme immunoassay] technique for the determination of salivary cortisol in cattle by Chacón Pérez, G, García-Belenguer Laita, S. (Universidad de Zaragoza (España). Facultad de Veterinaria), Illera del Portal, J.C, Palacio Liesa, J

“…This work involves the development and validation of an enzyme immunoassay technique (EIA) for the measurement of the cortisol concentration in cattle saliva…”
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Magnetic field induced metal-to-insulator transition in wide quantum wells by Ganitzer, P, Homer, A, Lucyshyn, M, Jamnig, B, Oswald, J, Maude, D.K, Portal, J.C

“…We present a systematic experimental study of the magnetic field induced metal–insulator transition in high mobility quasi-3D wide quantum wells. Depending on…”
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Skyrmion excitations in the limit of vanishing Landé g-factor by Maude, D.K., Marty, S., Rigal, L.B., Potemski, M., Portal, J.C., Wasilewski, Zb, Henini, M., Eaves, L., Hill, G., Pate, M.A.

“…The spin excitation gap ( E s) at odd integer filling factors ν=1, 3, 5, 7, 9, 11, 13 has been determined using transport measurements. The gap is dominated by…”
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Control of spin currents with double spin resonance by Nogaret, A., Saraiva, P., Dai, B., Portal, J.C.

“…This paper develops a theoretical picture for coherently controlling spin currents with two resonant transitions which bridge the Zeeman gap of a…”
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Ultra-high Aharonov–Bohm oscillations harmonics in a small ring interferometer by Kvon, Z.D., Kozlov, D.A., Olshanetsky, E.B., Plotnikov, A.E., Latyshev, A.V., Portal, J.C.

“…We report on the observation of ultra-high Aharonov–Bohm oscillations harmonics h / n e ( n = 40 – 45 ) in a very small quasibalistic ring (the ring effective…”
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Microwave induced magnetoresistance oscillations and inelastic scattering time in double quantum wells by Wiedmann, S., Gusev, G.M., Raichev, O.E., Bakarov, A.K., Portal, J.C.

“…The interference of microwave-induced resistance oscillations and magneto-intersubband oscillations in double quantum wells exposed to a continuous microwave…”
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Magneto-intersubband oscillations in triple quantum wells by Wiedmann, S., Mamani, N.C., Gusev, G.M., Raichev, O.E., Bakarov, A.K., Portal, J.C.

“…We present magnetotransport studies of high-density triple quantum well samples with different barrier widths. Because of electron transitions between three…”
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Magnetoresistance oscillations in triple quantum wells under microwave irradiation by Wiedmann, S., Mamani, N.C., Gusev, G.M., Raichev, O.E., Bakarov, A.K., Portal, J.C.

“…The interference of magneto-intersubband oscillations and microwave-induced resistance oscillations is studied in high-density triple quantum wells. We give an…”
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Integer and fractional microwave induced resistance oscillations in a 2D system with moderate mobility by Wiedmann, S., Mamani, N.C., Gusev, G.M., Raichev, O.E., Bakarov, A.K., Portal, J.C.

“…We report on integer and fractional microwave-induced resistance oscillations in a 2D electron system with high density and moderate mobility, and present…”
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Electron–electron interactions in clean quantum point contacts in the large conductance regime by Renard, V.T., Tkachenko, O.A., Tkachenko, V.A., Ota, T., Kumada, N., Portal, J.C., Hirayama, Y.

“…We report an unusual increase with temperature of the conductance of clean quantum point contact at large conductance and B = 0 T . Numerical simulation…”
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Electromagnetic analysis of the experimental setup used to investigate the ratchet effect in two-dimensional electron system under microwave radiation by Takacs, A., Medhat, D., Aubert, H., Portal, J.C.

“…This paper addresses simulation and analysis of the experimental setup for investigation of ratchet effect on semiconductor heterojunctions with periodic array…”
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Reentrant quantum Hall effect in bilayer system at high filling factors by Gusev, G.M., Bakarov, A.K., Lamas, T.E., Portal, J.C.

“…We report on the measurements of the quantum Hall effect states in double quantum well structures at the filling factors ν = 4 N + 1 and 4 N + 3 , where N is…”
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Magnetoresistance and resistance versus temperature dependence of a mesoporous mesophase carbon by Sassine, S., Olshanetsky, E.B., Kvon, Z.D., Mel’gunov, M.S., Mel’gunova, E.A., Portal, J.C.

“…In the present work the transport properties of mesoporous mesophase carbon (MMC) powder have been investigated in wide temperature and magnetic field ranges…”
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Shubnikov de Haas oscillations in double wells with opposite signs of the electronic g-factor by Armas, L.E.G., Gusev, G.M., Bakarov, A.K., Oliveira, N.F., Portal, J.C.

“…We report on the measurements of the Shubnikov de Haas oscillations (SdH) in symmetrically doped Al x Ga 1 - x As double wells with different Al compositions…”
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Electric field controlled g-factor in parabolic well determined by transport measurements by Duarte, C.A., Gusev, G.M., Quivy, A.A., Lamas, T.E., Portal, J.C.

“…The Shubnikov de Haas oscillations in 500 Å parabolic well are studied in the tilted magnetic field. The electric field displaces the electron wave function…”
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Magnetoconductivity of a spin-polarized two-dimensional electron gas near the (1 1 1) silicon surface by Estibals, O, Kvon, Z.D, Gusev, G.M, Arnaud, G, Portal, J.C

“…The magnetoresistance of a disordered and highly interacting two-dimensional electron gas (2DEG) in a silicon (1 1 1) MOSFET has been measured in the presence…”
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Pressure dependence of magnetization in diluted magnetic semiconductors by Bednarski, H., Cisowski, J., Portal, J.C.

“…We have introduced a scaling procedure of the pressure dependence of magnetization in diluted magnetic semiconductors (DMS) based on quite general…”
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Large positive quasi-classical magnetoresistance in high mobility 2D electron gas: interplay of short- and long-range disorder by Kvon, Z.D., Renard, V., Gusev, G.M., Portal, J.C.

“…We observed a giant positive quasi-classical magnetoresistance (MR) of high mobility 2D electron gas in AlGaAs/GaAs heterostructure. The MR is non-saturating…”
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Quantum Hall ferromagnet in a two-dimensional electron gas coupled with quantum dots by Gusev, G.M., Sotomayor, N.M., Seabra, A.C., Quivy, A.A., Lamas, T.E., Portal, J.C.

“…We have studied the magnetoresistance in the two-dimensional electron gas (2DEG) coupled with quantum dots. The structures consist of asymmetrically doped GaAs…”
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