Search results

Sort By:

Limit search:

High-Pressure Magnetotransport Measurements of Resonant Tunnelling via X-Minimum Related States in AlAs Barrier

100%

Gryglas M., Przybytek J., Baj M., Eaves L., Henini M.

Acta Physica Polonica A

2001

vol. 100

issue 3

403-408

In this paper, we present the results of magnetotransport experiments performed on a single barrier GaAs/AlAs/GaAs heterostructures. Tunnel current was measured as a function of magnetic field for different values of bias voltage and hydrostatic pressure. We observed that the amplitude of the magnetooscillations of tunnel current quenched when the requirements for resonant tunnelling were met and it recovered in out-of-resonance conditions. This effect was observed both for tunnelling through donor states and through X-minimum related quasiconfined conduction band states. The fact that also in the latter case the amplitude was restored suggests that this process involved X_z subbands and took place without a participation of phonons (the so-called k_ǁ-conserving process).

Spectroscopy of a Single Si Donor by the Resonant Tunnelling Experiment

86%

Baj M., Gryglas M., Jouault B., Maude D., Faini G., Gennser U., Cavanna A.

Acta Physica Polonica A

2006

vol. 110

issue 2

157-162

Resonant tunnelling via single impurities placed in a single barrier was experimentally studied. The typically observed structures in the current-voltage characteristics seem to be paired. Such a pair can be interpreted as ground and excited states of an impurity, related to X_{xy} and X_z valleys, which is in agreement with the results obtained for big mesas. However, it is not clear why X_{xy} states can be seen without any phonon participation.

Refine search results

2 Acta Physica Polonica A

1 2006

1 2001

2 Baj M.

2 Gryglas M.

1 Cavanna A.

1 Eaves L.

1 Faini G.

1 Gennser U.

1 Henini M.

1 Jouault B.

1 Maude D.

1 Przybytek J.

Search results

High-Pressure Magnetotransport Measurements of Resonant Tunnelling via X-Minimum Related States in AlAs Barrier

Spectroscopy of a Single Si Donor by the Resonant Tunnelling Experiment