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

• Authors: M. Gryglas , J. Przybytek , M. Baj , L. Eaves , M. Henini
• Languages of publication: EN

Abstracts

EN

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).

Keywords

EN

73.43.Jn; 73.63.Hs

Discipline

• 73.43.Jn: Tunneling
• 73.63.Hs: Quantum wells

• Journal: Acta Physica Polonica A
• Year: 2001
• Volume: 100
• Issue: 3
• Pages: 403-408

Dates

published

2001-09

received

2001-06-01

Contributors

author

M. Gryglas

• Institute of Experimental Physics, Warsaw University, Hoża 69, 00-681 Warsaw, Poland

author

J. Przybytek

• Institute of Experimental Physics, Warsaw University, Hoża 69, 00-681 Warsaw, Poland

author

M. Baj

• Institute of Experimental Physics, Warsaw University, Hoża 69, 00-681 Warsaw, Poland

author

L. Eaves

• Department of Physics, University of Nottingham, University Park, Nottingham NG7 2RD, UK

author

M. Henini

• Department of Physics, University of Nottingham, University Park, Nottingham NG7 2RD, UK

References

• 1. I.E. Itskevich, L. Eaves, P.C. Main, M. Henini, G. Hill, Phys. Rev. B, 57, 7214, 1998
• 2. M. Gryglas, J. Przybytek, M. Baj, L. Eaves, M. Henini, High Pressure Res., 18, 63, 2000
• 3. H.W. van Kesteren, E.C. Cosman, P. Dawson, K.J. Moore, C.T. Foxon, Phys. Rev. B, 39, 13426, 1989
• 4. J.J. Finley, R.J. Teissier, M.S. Skolnick, J.W. Cockburn, G.A. Roberts, R. Grey, G. Hill, M.A. Pate, R. Planel, Phys. Rev. B, 58, 10619, 1998

Identifiers

DOI

10.12693/APhysPolA.100.403