Carrier Density Control by Illumination in Surface Doped, p-Type (Cd,Mn)Te Quantum Wells

• Authors: W. Maślana , P. Kossacki , J. Gaj , D. Ferrand , M. Bertolini , S. Tatarenko , J. Cibert , M. Kutrowski , T. Wojtowicz
• Languages of publication: EN

Abstracts

EN

We report both decrease and increase in the 2D carrier gas density in a simple (Cd,Mn)Te/(Cd,Mg)Te heterostructure with (Cd,Mn)Te quantum well. The two effects were achieved by light with different photon energies. The quantum wells were 10 nm wide with 2D hole gas supplied by surface states. For the sample with 25 nm cap layer thickness, it was possible to tune the hole gas concentration from almost empty well (hole density below 1×10^{10} cm^{-2}) to 45×10^{10} cm^{-2}. The illumination with 425 nm wavelength almost doubled the hole gas density from the initial 24×10^{10} cm^{-2}. The depletion mechanism was most effective for illumination with the orange (575 nm) light.

Keywords

EN

75.50.Pp; 78.67.De; 61.72.Vv

Discipline

• 78.67.De: Quantum wells
• 75.50.Pp: Magnetic semiconductors

• Publisher: Institute of Physics, Polish Academy of Sciences
• Journal: Acta Physica Polonica A
• Year: 2006
• Volume: 110
• Issue: 2
• Pages: 255-262

Dates

published

2006-08

received

2006-06-17

Contributors

author

W. Maślana

• Institute of Experimental Physics, Warsaw University, Hożza 69, 00-681 Warsaw, Poland
• Laboratoire de Spectrométrie Physique, CNRS et Université Joseph Fourier - Grenoble, B.P. 87, 38402 Saint Martin d'Héres Cedex, France

author

P. Kossacki

• Institute of Experimental Physics, Warsaw University, Hożza 69, 00-681 Warsaw, Poland
• Laboratoire de Spectrométrie Physique, CNRS et Université Joseph Fourier - Grenoble, B.P. 87, 38402 Saint Martin d'Héres Cedex, France

author

J. Gaj

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

author

D. Ferrand

• Laboratoire de Spectrométrie Physique, CNRS et Université Joseph Fourier - Grenoble, B.P. 87, 38402 Saint Martin d'Héres Cedex, France

author

M. Bertolini

• Laboratoire de Spectrométrie Physique, CNRS et Université Joseph Fourier - Grenoble, B.P. 87, 38402 Saint Martin d'Héres Cedex, France

author

S. Tatarenko

• Laboratoire de Spectrométrie Physique, CNRS et Université Joseph Fourier - Grenoble, B.P. 87, 38402 Saint Martin d'Héres Cedex, France

author

J. Cibert

• Laboratoire Louis Néel, CNRS, B.P. 166, 38042 Grenoble Cedex, France

author

M. Kutrowski

• Institute of Physics, Polish Academy of Sciences, al. Lotników 32/46, 02-668 Warsaw, Poland

author

T. Wojtowicz

• Institute of Physics, Polish Academy of Sciences, al. Lotników 32/46, 02-668 Warsaw, Poland

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Identifiers

DOI

10.12693/APhysPolA.110.255